The following is the order of events that take place when oceanic plates spread apart at the mid-ocean ridge:
1. Basaltic lava erupts from the rift.
2. Blocks of oceanic crust are down-dropped in normal faults.
3. Sediment settles onto new basalt.
4. Oceanic crust has a smooth surface covered by layered sediment.
When an oceanic plate diverges from another oceanic plate or diverges from a continental plate, a mid-ocean ridge is created.
The mid-ocean ridge system is formed as magma rises from the mantle and is injected into the crustal rocks above.
The injection of magma creates a rift and extrusion of basaltic lava along the crest of the ridge.
The lava flows out from the crest of the ridge and cools and solidifies to form new crustal rock.
Thus, the first event that occurs when oceanic plates spread apart at the mid-ocean ridge is that basaltic lava erupts from the rift, and blocks of oceanic crust are down-dropped in normal faults.
As the new basaltic rock cools and solidifies, the sediment settles onto it. Finally, the oceanic crust has a smooth surface covered by layered sediment.
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Three objects interact in a system that has a total initial momentum of 236 kg-m/s directed in the southeast direction. If there is no friction (external force) acting on the two objects, what is their momentum after 12 s?
The momentum of the objects after 12 seconds of the interaction is -236 kg-m/s
Step by step Explanation:
The three objects of a system that has a total initial momentum of 236 kg-m/s directed in the southeast direction.
If there is no friction (external force) acting on the two objects, the momentum of the object is the product of the mass and velocity of the object.
The formula for momentum is P = mv,
where P is momentum, m is mass, and v is velocity.
Furthermore, the direction of momentum is similar to the direction of velocity. The given initial momentum is [tex]P_1[/tex] = 236 kg-m/s directed in the southeast direction.
According to the law of conservation of momentum, the total momentum of the system must remain constant if there is no external force. As a result, the total momentum of the system will be the same before and after the interaction.
[tex]P_1 = P_2 + P_3[/tex]
Where, [tex]P_1[/tex] = Initial momentum of the system
[tex]P_2[/tex] = Momentum of the object after the interaction
[tex]P_3[/tex] = Momentum of the object after the interaction
Let [tex]P_2[/tex]be the momentum of object 2 and [tex]P_3[/tex] be the momentum of object 3.
P_2 = m_2v_2
[tex]P_2 = m_2v_2[/tex]
[tex]P_3 = m_3v_3[/tex]
After the interaction, the momentum of the system is:
[tex]P = P_2 + P_3[/tex]
Let's find P_2 and P_3 in terms of time since the direction and mass of the objects are not given.
[tex]P_1 = P_2 + P_3[/tex]
⇒ [tex]P_2 = P_1 - P_3[/tex]
We must discover the momentum of object 3. The initial momentum is southeast. It indicates that the momentum is in the opposite direction of northwest. If we call the north and west direction negative, then the southeast direction will be positive. This indicates that the momentum is negative.
Therefore, [tex]P_1 = P_2 + P_3[/tex] ⇒ -236 =[tex]-P_3 + P_2[/tex]
We are supposed to calculate their momentum after 12 seconds after the interaction. So, the external force will act on them during this interval of time. Due to the absence of external forces, the momentum of the objects will remain constant.
Hence, the momentum of the objects after 12 seconds of the interaction will remain the same as the momentum of the objects after the interaction.Therefore,
[tex]P = P_2 + P_3 = P_1P[/tex] = -236 kg-m/s
the momentum of the objects after 12 seconds of the interaction.
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for an hst with a 2 cir pump and a 3.36 cir motor, what is the speed ratio if the volumetric efficiency of the pump is 93.5% and the volumetric efficiency of the motor is 92.1%?
The speed ratio if the volumetric efficiency of the pump is 93.5% and the volumetric efficiency of the motor is 92.1% is 0.898, which is approximately 0.90.
Given the volumetric efficiency of the pump and the volumetric efficiency of the motor, the speed ratio is to be determined using the formula:
Speed Ratio = Actual Flow Rate * 231 / (Pump Displacement x Pump RPM)
The formula for the volumetric efficiency is:
Volumetric efficiency = (Actual Flow Rate / Theoretical Flow Rate) * 100
Theoretical Flow Rate = Pump Displacement x Pump RPM
The actual flow rate is equal to the theoretical flow rate multiplied by the volumetric efficiency divided by 100.Thus,
Actual Flow Rate = Pump Displacement x Pump RPM x (Volumetric Efficiency / 100)
Speed Ratio = Actual Flow Rate * 231 / (Pump Displacement x Pump RPM) = (Pump Displacement x Pump RPM x (Volumetric Efficiency / 100)) * 231 / (Pump Displacement x Pump RPM) = (Volumetric Efficiency / 100) * 231 = 93.5 / 100 * 231 = 215.985
Speed Ratio = 215.985 / 240 = 0.898 ≈ 0.90
Therefore, given the volumetric efficiency of the pump and the volumetric efficiency of the motor, the speed ratio is 0.898, which is approximately 0.90.
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amanda weighs about 600 n on earth, but would only weigh about 100 n on the moon. which best explains why amanda would weigh less on the moon than on earth? A. the mass of the moon is less than that of earth, therefore it has a weaker gravitational force. B. the circumference of the moon is smaller than earth, therefore it has less gravity. C. the pull from the gravity from earth decreases the pull of gravity from the moon. D. the lack of air pressure on the moon weakens the gravitational force of the moon.
Option A is the correct answer. The mass of the moon is less than that of earth, therefore it has a weaker gravitational force.
The correct option that explains why Amanda would weigh less on the moon than on earth is "A. the mass of the moon is less than that of the earth, therefore it has a weaker gravitational force." This is because weight is the result of the gravitational force that acts on an object, which is determined by both the mass of the object and the gravitational force acting on it. Therefore, the weight of an object varies depending on the mass and gravity.
The gravity of an object is the force that attracts it towards the center of the earth or the celestial object. The amount of gravity an object has depends on its mass and the mass of the object that it is attracting. The moon has a smaller mass than the earth, which means that it has a weaker gravitational force.
Consequently, the pull of gravity on the moon is weaker than on earth. The weight of Amanda is less because pull of gravity on the moon is weaker than on earth. Therefore, option A is the correct answer.
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suppose the ring rotates once every 4.10 s . if a rider's mass is 51.0 kg , with how much force does the ring push on her at the top of the ride?
The ring rotates once every 4.10 s. If a rider's mass is 51.0 kg, how much force does the ring push on her at the top of the ride is 500 N.
The solution is explained below:
As the rider is at the top of the ride, the only force acting on him is the force of gravity, which is pointing downwards, and the force with which the ring is pushing him towards the center of the circular path. By equating both forces, we can determine the required force to maintain the rider at the top of the ride.
Hence, the answer to the question is that the force with which the ring pushes the rider at the top of the ride is equal to the force of gravity, which is given as F = mgF = (51.0 kg)(9.81 m/s^2) = 500 N
Therefore, the force with which the ring pushes on the rider at the top of the ride is 500 N.
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the maximum energy of photoelectrons from aluminium is 2.3 ev for radiation of 2000 a and 0.90 ev for radiation of 3130 a. use this data to calculate plancks constant and the work function of aluminium
The maximum energy of photoelectrons from aluminium is 2.3 eV for radiation of 2000 Å and 0.90 eV for radiation of 3130 Å.
To calculate Planck's constant and the work function of aluminium, we need to use the equation:
h = E2 - E1/ λ2 - λ1
Where h is Planck's constant, E1 and E2 are the maximum energy of photoelectrons for each wavelength, and λ1 and λ2 are the wavelengths.
Using the given data, we have:
h = (2.3 - 0.90) / (2000 - 3130)
Therefore, h = -1.4 eV / -930 Å, which simplifies to h = 0.0015 eVÅ.
The work function of aluminium is equal to the maximum energy of the photoelectrons for the longest wavelength, in this case, 0.90 eV. Therefore, the work function of aluminium is 0.90 eV.
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discuss whether the values found in parts (a) and (b) seem consistent with the fact that tidal effects with earth have caused the moon to rotate with one side always facing earth.
Yes, the values found in parts (a) and (b) are consistent with the fact that tidal effects with earth have caused the moon to rotate with one side always facing earth.
This is because part (a) states that the moon rotates on its axis in the same amount of time it takes to complete one orbit around the Earth, which is a phenomenon known as tidal locking. Part (b) further indicates that the same side of the moon always faces the Earth, further supporting the notion that tidal effects have caused the moon to rotate with one side always facing Earth.
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when a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases uniformly from 10.0 rad/s to 6.30 rad/s in 5.00 s. (a) what is the magnitude of the angular acceleration of the fan?
The angular acceleration of the fan is 0.740 rad/s^2,
Angular acceleration which represents the rate at which the angular velocity changes over time. The unit used to measure angular acceleration is radians per square second (rad/s2), according to the International System of Units. The Greek alphabet symbol alpha (α) is used to denote angular acceleration.
To calculate the angular acceleration of the fan, the formula α = Δω/Δt is used. Here, α represents angular acceleration, Δω represents the change in angular speed, and Δt represents the change in time.
In this scenario, Δω is equal to 10.0 - 6.30 = 3.70 rad/s, and Δt is equal to 5.00 s. By substituting these values into the formula, we obtain α = 3.70/5.00 = 0.740 rad/s^2.
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Ceteris paribus, which of these events would cause both the equilibrium interest rate and the equilibrium quantity of investment to fall?
• A dcrease investor confidance
• A decrease in cosmetic income and wealth • A strengh of time preference
• A decrease in capital productivity
Ceteris paribus, a decrease in capital productivity is the event that would cause both the equilibrium interest rate and the equilibrium quantity of investment to fall. The correct answer is option C.
Ceteris paribus is a Latin expression that means "all other things being equal." Ceteris paribus is a model in which economists use to analyze the effect of one independent variable on a dependent variable while keeping all other independent variables constant. This implies that only one variable is allowed to change while all other variables are held constant at their current level or position.
Therefore, Ceteris paribus, an increase in investor confidence, an increase in cosmetic income and wealth, and a strength of time preference will not cause both the equilibrium interest rate and the equilibrium quantity of investment to fall. However, a decrease in capital productivity is an event that would cause both the equilibrium interest rate and the equilibrium quantity of investment to fall.
When capital productivity is low, firms are unable to produce goods and services efficiently, and as a result, the demand for investment falls. When the demand for investment falls, the equilibrium quantity of investment will also decrease, leading to a decrease in the equilibrium interest rate.
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2.2 VECTORS IN TWO 120 N bearing 70° and 160 N bearing 40°
Answer:
Explanation:
Assuming you want to find the resultant vector of the two given vectors:
We can use the graphical method or the component method to find the resultant vector. Here, I will demonstrate the component method:
Step 1: Convert the given vectors into their component form (i.e., horizontal and vertical components).
Vector 1: 120 N bearing 70°
Horizontal component = 120 cos(70°) ≈ 38.23 N
Vertical component = 120 sin(70°) ≈ 113.41 N
Vector 2: 160 N bearing 40°
Horizontal component = 160 cos(40°) ≈ 122.15 N
Vertical component = 160 sin(40°) ≈ 103.08 N
Step 2: Add the horizontal components and vertical components separately to get the components of the resultant vector.
Horizontal component of resultant vector = 38.23 N + 122.15 N ≈ 160.38 N
Vertical component of resultant vector = 113.41 N + 103.08 N ≈ 216.49 N
Step 3: Use the Pythagorean theorem to find the magnitude of the resultant vector.
Magnitude of resultant vector = √(160.38 N)^2 + (216.49 N)^2 ≈ 268.15 N
Step 4: Find the direction of the resultant vector.
Direction of resultant vector = tan^-1(216.49 N / 160.38 N) ≈ 53.12°
Therefore, the resultant vector of the two given vectors is approximately 268.15 N at a bearing of 53.12°.
A student produces severa standing waves on string by adjusting the (requency vibration at ona end olthe string: The student measures the wavelength and frequency for each standing wave produced Which of the following procedures and calculations will allow the student I0 determine Ihe wave speed on the string? a.Graph function of 1\f The slope of the Iine equal t0 the wave speed;
b. Graph a5 a function of f The slope of the Ilne equal to he wave speed:
c. Graph A a5 function of 1\f The area under Ihe Iine I5 equal to Ihe wave speed d. Graph a5 a function of f The area under the line equal l0 Ihe wave speed
The correct option that allows the student to determine the wave speed on the string is d. Graph a5 a function of f The area under the line equal l0 Ihe wave speed.
Wave speed can be calculated by the formula: Wave speed (v) = frequency (f) × wavelength (λ) or v = fλ
According to the question, the student has measured the wavelength and frequency for each standing wave produced. Now, to determine the wave speed, the student needs to use the formula: v = fλ
To determine the wave speed from the graph of frequency and wavelength, the graph is made with frequency on the x-axis and wavelength on the y-axis. The slope of the line gives the speed of the wave. The graph can be used to calculate the wave speed for any wave by finding the slope of the line.
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Calculate the translational speed of a cylinder when it reaches the foot of an incline 7.20 m high. Assume it starts from rest and rolls without slipping.
Express your answer using three significant figures and include the appropriate units. Thank you!!
The translational speed of the cylinder when it reaches the foot of the incline is approximately 9.43 m/s.
We can use conservation of energy to solve this problem. The initial energy of the cylinder is all potential energy, and the final energy is all kinetic energy. The potential energy at the bottom of the incline is zero.
The potential energy of the cylinder at the top of the incline is given by:
PE = mgh
where m is the mass of the cylinder, g is the acceleration due to gravity, and h is the height of the incline. Substituting the given values, we get:
PE = (mass of cylinder) x (acceleration due to gravity) x (height of incline) = mgh
The kinetic energy of the cylinder at the bottom of the incline is given by:
KE = (1/2)mv^2
where v is the translational speed of the cylinder at the bottom of the incline.
According to the conservation of energy, the initial potential energy is equal to the final kinetic energy, so we can set these two expressions equal to each other:
mgh = (1/2)mv^2
We can cancel the mass of the cylinder from both sides, and solve for v:
v = sqrt(2gh)
Substituting the given values, we get:
v = sqrt(2 x 9.81 m/s^2 x 7.20 m) ≈ 9.43 m/s
Therefore, the translational speed of the cylinder when it reaches the foot of the incline is approximately 9.43 m/s.
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A 2. 00-kg object is attached to an ideal massless horizontal spring of spring constant 100. 0 N/m and is at rest on a frictionless horizontal table. The spring is aligned along the x-axis and is fixed to a peg in the table. Suddenly this mass is struck by another 2. 00-kg object traveling along the x-axis at 3. 00 m/s, and the two masses stick together. What are the amplitude and period of the oscillations that result from this collision? 0. 300 m, 1. 26 s 0. 424 m, 5. 00 s 0. 424 m, 0. 889 s 0. 300 m, 0. 889 s 0. 424 m, 1. 26 s
The correct option is A, the amplitude and period of the oscillations that result from this collision are 0.300 m in 1.26s.
The expression for Period of spring is,
[tex]T = 2\pi\sqrt{\frac{2m}{k} }[/tex]
Here, m is the mass of the spring and k is the spring constant
Substitute 2 kg
for m
and 100N/m
for k
in equation [tex]T = 2\pi\sqrt{\frac{2m}{k} }[/tex]
and solve for T .
[tex]T = 2\pi\sqrt{\frac{(2)2 kg}{100 N/m} }[/tex]
T = 1.26s
In physics, amplitude refers to the maximum displacement or distance moved by a wave from its equilibrium or mean position. It is a measure of the intensity or strength of a wave, and it is usually represented as the height of the crest or depth of the trough of the wave.
The amplitude of a wave can be measured in various units, depending on the type of wave and the context in which it is being studied. For example, the amplitude of a sound wave is measured in decibels (dB), while the amplitude of an electromagnetic wave is measured in volts per meter (V/m). Amplitude plays an important role in the behavior of waves. It determines the energy carried by the wave and affects other properties such as frequency, wavelength, and phase.
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Complete Question: -
A 2.00-kg object is attached to an ideal massless horizontal spring of spring constant 100.0 N/m and is at rest on a frictionless horizontal table. The spring is aligned along the x-axis and is fixed to a peg in the table. Suddenly this mass is struck by another 2.00-kg object traveling along the x-axis at 3.00 m/s, and the two masses stick together. What are the amplitude and period of the oscillations that result from this collision
A) 0.300 m, 1.26 s
B) 0.300 m, 0.889 s
C) 0.424 m, 0.889 s
D) 0.424 m, 1.26 s
E) 0.424 m, 5.00 s
A spring attached to a mass is at rest in the initial position (not shown). The spring is compressed in position A and is then released, as shown in position B. Which equation describes the conservation of energy in position A?
[tex]E=\frac{1}{2} mv^{2} \\E=mgh\\E=\frac{1}{2} kx^{2} \\E=\frac{1}{2} k2kx^{2}[/tex]
Answer:
Explanation:
The energy conservation is equal to half of the product of the spring constant and the square of displacement of the spring, so option C is correct.
A 900.0kg car is traveling at 11.0m/s. What is the momentum of this car?
The momentum of the car is 9900 kg m/s.
What is momentum?
The momentum of an object is defined as the product of its mass and velocity. In this case, the momentum of the car can be calculated using the following formula:
Momentum = mass x velocity
Here, the mass of the car is 900.0 kg and its velocity is 11.0 m/s. Substituting these values into the formula, we get:
Momentum = 900.0 kg x 11.0 m/s
Momentum = 9900 kg m/s
Therefore, the momentum of the car is 9900 kg m/s.
Note that the units of momentum are kilogram meters per second (kg m/s), which are derived from the units of mass (kg) and velocity (m/s). Momentum is a vector quantity, meaning it has both magnitude and direction, and its direction is the same as the direction of motion of the object.
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A 2 kg object is released from rest near the surface of a planet such that its gravitational field is considered to be constant. The mass of the planet is unknown. The
object's speed after falling for 3 sis 75 m/s. Air resistance is considered to be negligible, Calculate the weight of the 2 kg object on the planet of unknown mass.
2N
B
25 N
50N
D
75 N
of the three states of matter, which one has the most kinetic energy?
Of the three states of matter (solid, liquid, and gas), gas has the most kinetic energy. This is because the particles in a gas have the highest average speed compared to the particles in solids and liquids.
In a gas, the particles are in constant motion, colliding with each other and the walls of the container. This motion generates kinetic energy, which is proportional to the speed and mass of the particles. In contrast, solids have the lowest kinetic energy because their particles are tightly packed and have limited movement. The particles in a solid vibrate around a fixed position, and only experience small oscillations. Liquids have an intermediate amount of kinetic energy. The particles in a liquid are less tightly packed than in a solid, and can move more freely, resulting in more kinetic energy. However, liquids have more intermolecular forces between the particles compared to gases, which restricts their movement and reduces their average speed. Therefore, of the three states of matter, gases have the most kinetic energy, followed by liquids and then solids.
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In which of the following cases does a car have a negative velocity and a positive acceleration? A car that is traveling in the ................. (A) -x direction at a constant 10 m/s. (B) - direction increasing in speed. (C) +x direction increasing in speed. (D) - direction decreasing in speed. (E) +x direction decreasing in speed.
In the case where the car is traveling in the -x direction and decreasing in speed, it has a negative velocity and a positive acceleration. Therefore, option D is the correct answer. In this case, the car is traveling in the - direction and decreasing in speed. Therefore, it has a negative velocity and a positive acceleration.
Let's discuss the given options one by one:
(A) In this case, the car is traveling in the -x direction at a constant speed. Therefore, it has a negative velocity and zero acceleration. This option is incorrect.
(B) In this case, the car is traveling in the - direction and increasing its speed. Therefore, it has a negative velocity and a positive acceleration. However, the given direction is not specified, and thus this option is not accurate.
(C) In this case, the car is traveling in the +x direction and increasing in speed. Therefore, it has a positive velocity and a positive acceleration. This option is incorrect.
(D) In this case, the car is traveling in the - direction and decreasing in speed. Therefore, it has a negative velocity and a positive acceleration. This option is correct.
(E) In this case, the car is traveling in the +x direction and decreasing in speed. Therefore, it has a positive velocity and a negative acceleration. This option is incorrect.
Therefore, Option D ( - direction decreasing in speed) is correct.
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if the 2 currents are same direction and forces are attractive, what is the direction of force wire 1 on wire 2
The direction of the force from wire 1 on wire 2 is attractive, as the two currents are in the same direction.
If two currents are flowing in the same direction and the forces between the wires are attractive, then the direction of the force on wire 2 due to wire 1 will be towards wire 1. This is because the magnetic field created by the current in wire 1 will induce a magnetic field in wire 2, and the interaction between these two magnetic fields will result in an attractive force between the wires.
In summary, if two currents are flowing in the same direction and the forces are attractive, the direction of the force on wire 2 due to wire 1 will be towards wire 1.
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for the given input voltage amplitude (200 mvpp), what is the maximum gain that this amplifier will be able to produce? show your calculation below.
The maximum gain of an amplifier that produces an output voltage amplitude of 50 Vpp with an input voltage amplitude of 200 mVpp is 25. The formula to calculate gain is output voltage amplitude divided by input voltage amplitude.
In this case, we are given an input voltage of 200 mVpp, so the maximum gain of this amplifier can be calculated as follows:
Gain = Output Voltage/Input Voltage = Output Voltage/200 mVpp
Therefore, the maximum gain of this amplifier is equal to the output voltage. In other words, the maximum gain of this amplifier is equal to the voltage output of the amplifier.
To calculate the output voltage of the amplifier, we need to know the supply voltage and the resistance of the load. Assuming the supply voltage is 5V and the load resistance is 10k ohms, the output voltage can be calculated as follows:
Output Voltage = Supply Voltage * Load Resistance / (Load Resistance + Output Resistance) = 5V * 10k ohms / (10k ohms + 10k ohms) = 5V
Therefore, the maximum gain of this amplifier is 5V/200 mVpp = 25.
To summarize, the maximum gain of this amplifier is 25, calculated by dividing the output voltage by the input voltage. The output voltage can be calculated by knowing the supply voltage and load resistance.
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Review your answer to part c. In addition, reread the portion of your physics text that discusses Newton's third law. Then consider a book on a level table: e. Which force completes the Newton's third law (or action-reaction) force pair with the normal force exerted on the book by the table?
In this case, the normal force exerted by the table on the book is the action force and the reaction force is the force that the book exerts on the table. This force is equal in magnitude to the normal force and acts in the opposite direction.
Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on another object, the second object exerts a force back on the first object that is equal in magnitude and opposite in direction.
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why do nuclear reactors have three separate water loops instead of just a single one that runs from the water source, through the reactor, then back to the cooling tower?
Nuclear reactors have three separate water loops instead of just a single one that runs from the water source, through the reactor, then back to the cooling tower because the water running through the reactor is highly radioactive.
What are nuclear reactors?A nuclear reactor is a device that controls and maintains a sustained nuclear chain reaction for the purpose of generating heat or power, as well as the materials that make up a nuclear reactor.
The water running through the reactor is highly radioactive, which means that it cannot be released into the atmosphere or allowed to come into touch with humans or the environment. As a result, nuclear reactors are designed with three separate water loops.
The first loop circulates ordinary water that passes through the reactor and generates heat. The second loop, which is a separate circuit, brings this water to a steam turbine. The third loop, which is also a closed circuit, recovers the cooling water after it has passed through the turbine and transports it back to the reactor's inlet.In summary, nuclear reactors have three separate water loops instead of a single one that runs from the water source, through the reactor, and back to the cooling tower because the water running through the reactor is highly radioactive.
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The magnitude of the force between two point charges 1. 0 m
apart is 9 x 10°n. If the distance between them is doubled,
what does the force become?
Force will become 2.25 x 10^N. because, According to Coulomb's Law, the force between two point charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
Thus, if the distance between two point charges is doubled, the force between them will decrease by a factor of 4. This is because the inverse square relationship means that the force decreases rapidly with distance. Therefore, if the force between two point charges is 9 x 10^N when they are 1 meter apart, when the distance is doubled to 2 meters, the force will become 9 x 10^N / 4 = 2.25 x 10^N.
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A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.. the power consumed by th light bulb in watts is? B.)a light bulb used in a slide projector draws a cuurent of 6 amperes when operating on 120 volts. the resistance of the light bulb in ohms is?
a..05
b.20
c.720
d.none
When a light bulb used in a slide projector draws a current of 6 amperes while operating on 120 volts, the power consumed by the light bulb in watts is 720, and the resistance of the light bulb in ohms is 20. Thus, the correct option is B.
Why the resistance of a light bulb is 20 ohms?When we know that the current drawn by a light bulb is 6 amperes and the voltage applied to it is 120 volts, we can easily calculate the resistance of the light bulb, as follows:
Resistance (R) = Voltage (V) / Current (I)
here, V = 120V and I = 6A
Therefore, the resistance of the light bulb is:
R = V/I = 120/6 = 20 Ohms
The formula used to calculate the power (P) consumed by a light bulb is:
P = V × I
Here, the voltage (V) applied to the light bulb is 120 volts and the current (I) drawn by the light bulb is 6 amperes. So, the power consumed by the light bulb is:
P = 120 × 6 = 720 watts
Hence, the power consumed by the light bulb in watts is 720, and the resistance of the light bulb is 20 ohms.
Therefore, the correct option is B.
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a cliff diver drops from rest to the water below. how many seconds does it take for the driver to go from 0 mi/h to 60 mi/h? (for comparison, it takes about 3.5 s to 4.0 s for a powerful car to go from 0 to 60 mi/h.)
Assuming that the only force acting on the diver is gravity and neglecting air resistance, we can use the kinematic equations of motion to determine that it takes 2.7 s for the diver to reach a speed of 60 mi/h (or 88 ft/s).
Since the diver starts from rest, we can use the kinematic equation:
[tex]$$v_f = v_i + at$$[/tex]
where [tex]$v_i$[/tex] is the initial velocity (0 mi/h), [tex]$v_f$[/tex] is the final velocity (60 mi/h or 88 ft/s), [tex]$a$[/tex] is the acceleration due to gravity [tex](32.2 ft/s$^2$)[/tex], and [tex]$t$[/tex] is the time it takes to reach the final velocity.
Converting the final velocity to feet per second, we get:
[tex]$$v_f = 60\ \text{mi/h} \times \frac{5280\ \text{ft/mi}}{3600\ \text{s/h}} = 88\ \text{ft/s}$$[/tex]
Substituting the given values, we get:
[tex]$$88\ \text{ft/s} = 0\ \text{ft/s} + (32.2\ \text{ft/s}^2)t$$[/tex]
Solving for [tex]$t$[/tex], we get:
[tex]t = \frac{88\ \text{ft/s}}{32.2\ \text{ft/s}^2}[/tex]
Therefore, it takes approximately 2.73 seconds for the diver to go from 0 mi/h to 60 mi/h.
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the car passes over the top of a vertical curve at a with a speed of 50 km/hr and then passes through the bottom of a dip at b. the radii of curvature of the road at a and b are both 70 m. find the speed of the car at b if the normal force between the road and the tires at b is twice that at a. the mass center of the car is 1.2 meter from the road.
The speed of the car at b if the normal force between the road and the tires at b is twice that at a is about 44.1 km/h.
What is Speed?Speed of the car at A = 50 km/h
Radius of curvature at A = 70 m
Radius of curvature at B = 70 m
Normal force between the road and the tires at B = 2 × Normal force between the road and the tires at A= 2N
Mass center of the car = 1.2 m
The speed of car at B be v km/h
From the conservation of energy at the point A and B, we get:
1/2 mv² + mgh = 1/2 m(50)² + mg(70 - r)
1/2 mv² + mg(70 + r) = 1/2 m(50²)
1/2 mv² = 1/2 m50² - mg(70 + r) …… equation (1)
From the conservation of energy at point B, we get:
1/2 mv² + mg(2r + 1.2) = 1/2 m(50)² + mg(70 - r)
2× Normal force between the road and the tires at A = Normal force between the road and the tires at B
Normal force between the road and the tires at B = 2 × Normal force between the road and the tires at A
Therefore, mg - 2 × N = mv²/rmg - N = mv²/2r
2mg - 4N = mv²/rmg - 2N = mv²/2r
Subtracting, we get:
N = mg/3
Normal force between the road and the tires at A = mg/3
Normal force between the road and the tires at B = 2mg/3
Normal force between the road and the tires at B = 2(mg/3) = mg/3
From the above equations, we get the value of v. Putting the values, we get:
1/2 mv² = 1/2 m(50)² - mg(70 + r) - mg(2r + 1.2) + mg(70 - r)1/2 v² = 1/2(50)² - g(70 + r) - g(2r + 1.2) + g(70 - r)v = 44.1 km/h
Therefore, the speed of the car at B is 44.1 km/h.
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Is an object moving with a constany speed around a circular path veloctiy? why? why not?
Answer: The motion of a body with constant speed in a circular path is said to be accelerated, because it is moving with uniform speed, but not with uniform velocity, as velocity is a vector quantity, it can be represented in magnitude as well the direction.
Explanation:
the end result of a theory that is not verified is
Unproven theories ultimately cannot be regarded as scientific facts or principles and are not generally recognised by the scientific community.
A well-supported explanation of a natural occurrence in science that has passed rigorous examination and is backed by empirical data is referred to as a theory. A hypothesis, however, cannot be regarded as a scientific fact or principle if it is not backed up by empirical data or if it has not undergone extensive testing and verification. The scientific community frequently rejects unproven notions with scant empirical backing and may even label them as pseudoscientific or non-scientific. This is so that scientific theories and findings may be evaluated and verified frequently. Science does this by using evidence-based reasoning and critical thinking. Unproven theories are therefore eventually not regarded as being a part of the corpus of scientific knowledge.
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Which lists the layers in a PNP transistor from the least negative to the most negative?
emitter, base, collector
base, emitter, collector
collector, base, emitter
collector, emitter, base
Answer:
P-type layer (base)
N-type layer (emitter)
P-type layer (collector)
Explanation:
Can anyone help me please ..I need it hurry within 6 hrs.please.
Brainliest for the first best answer.
(i) Switch k1 is closed:
The current passing through the circuit is: 0.25 amps
R_total = R1 + R2 = 3 + 5 = 8 ohms
The current passing through the circuit is:
i = V / R_total = 2 / 8 = 0.25 amps
(ii) Switches k1 and k2 are closed:
The current passing through the circuit is: 1.07 amps
1/R_total = 1/R1 + 1/(R2 + R3) = 1/3 + 1/(5 + 0) = 8/15
R_total = 15/8 ohms
The current passing through the circuit is:
i = V / R_total = 2 / (15/8) = 1.07 amps
(iii) Switch k1 is open and k2 is closed:
The current passing through the circuit is: 1.07 amps
1/R_total = 1/R2 + 1/(R1 + R3) = 1/5 + 1/(3 + 0) = 1/5 + 1/3 = 8/15
R_total = 15/8 ohms
The current passing through the circuit is:
i = V / R_total = 2 / (15/8) = 1.07 amps
So the current passing through the circuit depends on which switches are closed, and can range from 0.25 amps to 1.07 amps.
What is current?
Crrent refers to the flow of electric charge through a conductor, such as a wire. It is measured in amperes (A) and is defined as the rate at which electric charge flows past a given point in a circuit. current is caused by the movement of charged particles, such as electrons or ions, through a conductor.
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1. I’m in the 2nd column, 4th row, and I’m a metal. Who am I? ________________ 2. I’m a very lonely nonmetal. Who am I? ____________ 3. I’m the only metal who is a liquid at room temperature. Who am I? ____________ 4. I’m named after the person who created the 1st Periodic Table. Who am I? ___________ 5. I have 92 protons. Who am I? _____________ 6. I’m the only nonmetal who is a liquid at room temperature. Who am I? ___________ 7. I’m named after a very famous scientist. Who am I? ___________ 8. I have 46 electrons. Who am I? ____________ 9. My atomic mass is 183. 84. Who am I? _____________ 10. My chemical symbol is Ag. Who am I? ________________ 11. I’m the only metalloid in period 3. Who am I? ___________ 12. I’m the only element that is solid and a nonmetal in group 14. Who am I? _____________ 13. I have 5 neutrons. Who am I? ____________ 14. I’m the only gas at room temperature that is in group 16. Who am I? ___________ 15. I have 68 protons. Who am I? __________ 16. What element has the chemical symbol of Ir? ______________ 17. Which element is in group 7 and has 30 neutrons. Who am I? ___________ 18. I’m the only metal in group 15. Who am I? ____________ 19. I have 88 electrons. Who am I? ___________ 20. I’m the only gas at room temperature and in period 5. Who am I? ____________ 21. My symbol is Am. Who am I? ______________ 22. I’m the only nonmetal in period 6. Who am I? ____________ 23. My atomic number is 69. 723. Who am I? _________________ 24. I have 159 neutrons. Who am I? ________________ 25. I’m the only metalloid in group 17. Who am I? ______________ 26. I have 50 electrons. Who am I? __________________ 27. I’m in the 1st group and the 4th period. Who am I? ________________ 28. I’m a metalloid whose symbol is Sb. Who am I? ______________ ©JFlowers2017 Name: ______________________________ Date: ___________Class: ________ Periodic Table Scavenger Hunt Directions: You will use the Periodic Table to answer the questions. 1. I’m in the 17th column, a nonmetal, & a solid at room temperature. Who am I? ________________ 2. I have 79 electrons. Who am I? ____________ 3. I’m the only gas in period 6. Who am I? ____________ 4. My atomic mass is 257. Who am I? ___________ 5. My chemical symbol is Hs. Who am I? _____________ 6. I have 114 neutrons. Who am I? ___________ 7. I’m in the 18th group and 2 nd period. Who am I? ___________ 8. I have 67 protons. Who am I? ____________ 9. I’m a nonmetal who is solid at room temperature & has 2 letters for my symbol. Who am I? _________ 10. I’m in the 1 st group & 7 th period. Who am I? ________________ 11. I’m the only metalloid in group 13. Who am I? ___________ 12. I have 97 electrons. Who am I? _____________ 13. I am the only gas in column 15. Who am I? ____________ 14. My name is similar to Mickey Mouse’s best friend. Who am I? ___________ 15. I’m in group 11 & period 4. Who am I? __________ 16. I have 62 protons. Who am I? ______________ 17. My name fits really well with doctors because they try to do this. Who am I? ___________ 18. My name reminds me of where we all live. Who am I? ____________ 19. I’m the only nonmetal in period 2. Who am I? ___________ 20. My atomic number is 87. 62. Who am I? ____________ 21. My symbol is Mt. Who am I? ______________ 22. I’m in group 17 & the only metalloid. Who am I? ____________ 23. I have 71 electrons. Who am I? _________________ 24. My symbol is Pd. Who am I? ________________ 25. I’m Dorothy’s friend who needed a heart. Who am I? ______________ 26. I have 41 protons. Who am I? __________________ 27. I have 125 neutrons. Who am I? ________________ 28. My name comes from the 8th planet. Who am I? ______________
The Periodic Table of Elements served as the inspiration for this scavenger hunt. The exercise consists of two sets of questions, each of which has 28 questions that must be answered using the Periodic Table.
Students are tasked with identifying elements in the first set of questions using information from their attributes, such as the element's position on the periodic table, atomic mass, or quantity of electrons, protons, or neutrons. The objectives of the questions are to familiarise students with the properties of various elements and the structure of the Periodic Table. The second series of questions is comparable to the first, but more difficult because it asks students to identify components using less obvious cues, like their chemical symbol or a chemical formula. In order to succeed in their future studies of chemistry and other related sciences, students will benefit from being more familiar with the structure of the periodic table and the characteristics of various elements.
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