Answer:
Explanation:
According to the law of conservation of momentum, the total momentum before the collision must be equal to the total momentum after the collision. We can use this principle to determine the resulting velocity of Kaylyn's puck after the collision.
Before the collision, Sharon's puck has a momentum of:
p1 = m1 * v1 = 0.3 kg * 6 m/s = 1.8 kg m/s
where m1 is the mass of Sharon's puck and v1 is its velocity.
Kaylyn's puck is at rest before the collision, so its momentum is:
p2 = m2 * v2 = 0.3 kg * 0 m/s = 0
where m2 is the mass of Kaylyn's puck and v2 is its velocity.
After the collision, Sharon's puck is at rest, so its momentum is:
p1' = m1 * v1' = 0.3 kg * 0 m/s = 0
where v1' is the velocity of Sharon's puck after the collision.
The total momentum after the collision is the momentum of Kaylyn's puck:
p2' = m2 * v2'
where v2' is the resulting velocity of Kaylyn's puck after the collision.
Using the conservation of momentum principle, we can write:
p1 + p2 = p1' + p2'
Substituting the values we have calculated:
1.8 kg m/s + 0 = 0 + 0.3 kg * v2'
Solving for v2':
v2' = (1.8 kg m/s) / (0.3 kg) = 6 m/s
Therefore, the resulting velocity of Kaylyn's puck after the collision is 6 m/s, which is equal to the velocity of Sharon's puck before they collided. The correct answer is option A.
An automobile engine slows down from 4500 rpm to 1200 rpm in 2.5 s. Calculate:
a) Its angular acceleration, assumed constant.
b) the total number of revolutions the engine makes in this time
a. The angular acceleration of the engine is -1320 rad/s².
b. The engine makes approximately 118.7 revolutions during the deceleration.
Given:
Initial angular velocity (ω1) = 4500 rpm
Final angular velocity (ω2) = 1200 rpm
Time is taken (t) = 2.5 s
a) The formula for angular acceleration is:
α = (ω2 - ω1) / t
Substituting the given values, we get:
α = (1200 rpm - 4500 rpm) / 2.5 s = -1320 rad/s² (negative sign indicates a deceleration)
Therefore, the angular acceleration of the engine is -1320 rad/s².
b) To find the total number of revolutions, we need to convert the initial and final angular velocities from rpm to rad/s:
ω1 = 4500 rpm × 2π/60 = 471 rad/s
ω2 = 1200 rpm × 2π/60 = 126 rad/s
The average angular velocity (ω_avg) during the deceleration is given by:
ω_avg = (ω1 + ω2) / 2 = (471 rad/s + 126 rad/s) / 2 = 298.5 rad/s
The total angular displacement (θ) of the engine during the deceleration is given by:
θ = ω_avg × t = 298.5 rad/s × 2.5 s = 746.25 rad
Finally, the total number of revolutions (N) made by the engine is:
N = θ / 2π = 746.25 rad / 2π rad/rev = 118.7 rev (approximately)
Therefore, the engine makes approximately 118.7 revolutions during the deceleration.
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is the amount by which the total run that conduit can cover is reduced because of the extra length required to bend around an obstacle.
Bending allowance is the amount by which the total run that conduit can cover is reduced because of the extra length required to bend around an obstacle.
When running conduit, bending is necessary to go around obstructions like structural members or corners. In order to avoid the use of too many fittings and to make installation faster and more efficient, it is best to avoid angles less than 30 degrees.
When measuring conduit length, it is important to include the bending allowance. The length of the conduit required can be calculated using the following formula:
Bending allowance = (Conduit diameter x bending angle) x 0.0175
Where,
Bending allowance is the additional length of the conduit needed to make the bend.
Conduit diameter is the diameter of the conduit being used.
Bending angle is the angle of the bend being made.
0.0175 is the constant factor used in this calculation.
For example, suppose we have to bend a 1.5-inch diameter conduit around a corner with a 45-degree angle. The bending allowance for this conduit would be:
Bending allowance = (1.5 x 45) x 0.0175
Bending allowance = 1.4 inches
So, when measuring the length of the conduit required for this bend, 1.4 inches should be added to the length of the conduit required to make up for the bending allowance.
The amount by which the total run that conduit can cover is reduced because of the extra length required to bend around an obstacle is called the bending allowance.
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Question:-
___ is the amount by which the total run that conduit can cover is reduced because of the extra length required to bend around an obstacle.
If the Kelvin temperature of an object is doubled, the amount of radiant energy emitted each second is _________ the original amount:a) 1/16thb) halfc) the same asd) 2 timese) 16 time
When the Kelvin temperature of an object is doubled, the amount of radiant energy emitted each second is E. 16 times the original amount.
The amount of energy emitted by a body of the Kelvin temperature varies according to the fourth power of its absolute temperature, according to Stefan's law. Radiant energy is emitted by a heated object because of the vibration of its particles. As a result, as the temperature of the body rises, so does the energy emitted from it. The energy radiated by a body is directly proportional to the temperature raised to the fourth power.
Therefore, the amount of energy radiated by a body is proportional to the fourth power of its absolute temperature, according to Stefan's law. Suppose the initial temperature of the object is T and the energy emitted per second is E. If the temperature of the object is doubled, the new temperature will be 2T. As a result, the amount of energy radiated by the object each second (E') would be calculated by: E' = E(2T /T )4E' = E(16)The amount of radiant energy emitted each second is 16 times the original amount when the Kelvin temperature of an object is doubled.
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Part A The two ropes seen in (Figure 1) are used to lower a 255 kg piano exactly 9 m from a second story window to the ground How much work is done by w? Express your answer in joules. O ACCO ? Figure 1 of 1 > Submit Request Answer Part B 1830 N 21 60° 7 1295 N How much work is done by Ti? Express your answer in joules. V AE = 0 2 ? 2500 N W= Submit Request Answer Caprub your answer ill juures. The two ropes seen in (Figure 1) are used to lower a 255 kg piano exactly 9 m from a second-story window to the ground O AO O a ? Submit Request Answer Part Figure 1 of 1 How much work is done by T2? Express your answer in joules. 1830 N 1295 N AX 60° 45° Submit 2500 N Request Answys Request Answer ovide Feedback
The work done by w is 22491 J.
The work done by Ti is 10728 J.
we have to determine the amount of work done by w. We can use the formula
W = Fd,
where W is the work done, F is the force applied, and d is the distance over which the force is applied.
The mass of the piano is given as 255 kg, and it is lowered exactly 9 m from the second-story window to the ground.
We can calculate the force required to lower the piano using the formula
F = mg,
where m is the mass of the piano and g is the acceleration due to gravity.
Therefore, [tex]F = 255 kg x 9.8 m/s^2 = 2499 N.[/tex]
Using the formula for work, we can calculate the work done by w as follows:
W = Fd = 2499 N x 9 m = 22491 J
we have to determine the amount of work done by Ti. We are given the magnitude of two forces, 1830 N and 1295 N, and the angle between them is 60°.
We can find the resultant force using the law of cosines, which states that
[tex]c^2 = a^2 + b^2 - 2ab cos(C),[/tex]
where c is the length of the side opposite the angle C and a and b are the lengths of the other two sides.
Therefore, [tex]c = sqrt(a^2 + b^2 - 2abcos(C)) = sqrt((1830 N)^2 + (1295 N)^2 - 2(1830 N)(1295 N)cos(60°)) = 2159 N.[/tex]
The angle between the resultant force and the horizontal is 45°, so we can calculate the work done by Ti using the formula
W = Fd cos(theta),
where theta is the angle between the force and the direction of motion.
Therefore, W = 2159 N x 7 m x cos(45°) = 10728 J.
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FILL IN THE BLANK 33. the road surface condition on which most motor vehicle crashes in florida occurred was on ___roads.
The road surface condition on which most motor vehicle crashes in Florida occurred was on WET ROADS.
The blank space should be filled with the word 'wet'.
A wet road is a road with water or other fluids on it, making it slippery, and it can cause vehicles to skid, slide, or hydroplane. Wet roads have been found to be the most common surface condition in most car accidents in Florida because of its weather condition.
Therefore, drivers should be extra careful while driving in the rain or during a storm to prevent such collisions. It's recommended to lower your driving speed, keep your car's headlights on, and avoid sharp turns or sudden braking when driving on wet roads.
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1. Background Q1: When you shine a laser with unknown wavelength through a diffraction grating with
1000slits/mm
, you observe the
m=1
bright fringe on the screen with an angle of 26 degrees away from the center of the grating. What is the wavelength of your laser? Using Figure 1 (freel free to screenshot, copy it, or draw your own version into your pre-lab document), label the information that you know about each part of the diagram, and what you are trying to find. Be clear about where exactly the angle measurement fits into the diagram. Figure 1. Schematic of experiment setup such that
M=±1
and
M=0
positions can be compared to determine the unknown wavelength of light coming from the laser pointer.
The wavelength of the laser is 52.24 nm.
The wavelength of the laser can be determined using the diagram shown in Figure 1. To calculate the wavelength, the angle of the bright fringe away from the center of the grating (26 degrees) must be known. This angle can be measured using the angle θ shown in the diagram. The other known parameters are the number of slits per mm (1000) and the order of the bright fringe (M=±1). Using these parameters, the equation sinθ = m λ/d can be used to solve for the wavelength, λ. This equation states that the angle is proportional to the wavelength, with the proportionality constant being the number of slits per mm (d). Substituting the known values yields the wavelength, λ, of the laser as
λ = (d sin θ)/m = (1000sin26)/±1 = 52.24 nm.
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A compact car can climb a hill in 10 s. The top of the hill is 30 m higher than the bottom, and the car’s mass is 1,000 kg What is the power output of the car?
Answer:
the power output of the car is 29.43 kW (rounded to two decimal places).
Explanation:
To find the power output of the car, we need to use the formula:
power = work / time
where work is the change in potential energy of the car as it climbs the hill, which can be calculated using the formula:
work = force x distance
where force is the force required to lift the car against gravity, which is given by:
force = mass x gravity
where mass is the mass of the car, and gravity is the acceleration due to gravity (9.81 m/s^2).
So, the force required to lift the car against gravity is:
force = 1000 kg x 9.81 m/s^2 = 9810 N
The distance the car travels up the hill is 30 m.
Therefore, the work done by the car is:
work = force x distance = 9810 N x 30 m = 294300 J
The time taken by the car to climb the hill is 10 s.
Therefore, the power output of the car is:
power = work / time = 294300 J / 10 s = 29430 W
A metal wire, fixed at one end, has length l and cross-sectional area A. The wire extends a distance e which mass m is hung from the other end of the wire.What is an expression for the Young Modulus E of the metal?
The expression for the Young Modulus E of the metal is E = mgl / Ae. The Young Modulus E of the metal is calculated using the equation E = (F l) / (A e2 m), where F is the force applied to the wire.
To find the expression for the Young modulus E of a metal wire with length l, cross-sectional area A, and mass m hung from the other end of the wire, we need to use the following formula:Stress (σ) = Load (F) / Area (A)Strain (ε) = Extension (Δl) / Original length (l)Young Modulus (E) = Stress (σ) / Strain (ε)We know that the metal wire is fixed at one end and the wire extends a distance e when a mass m is hung from the other end of the wire. Therefore, the extension Δl is equal to e.
Let's assume that g is the acceleration due to gravity. Therefore, the load F is equal to m * g.Substituting the values of F, A, and Δl in the above formula, we get:Stress (σ) = F / A = (m * g) / AStrain (ε) = Δl / l = e / lYoung Modulus (E) = Stress (σ) / Strain (ε)= (m * g) / (A * e / l) = mgl / AeTherefore, an expression for the Young Modulus E of the metal is E = mgl / Ae.
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the 50-mm-diameter a992 steel shaft is subjected to the torques shown. determine the angle of twist of the end a.
The angle of twist of end A is 0.0150 radians or 0.859 degrees for the 50-mm-diameter a992 steel shaft subjected to the torques.
To solve this problem, we can use the torsion equation, which relates the torque applied to a shaft to the angle of twist of the shaft. The equation is:
T/J = Gθ/L
where T is the torque applied to the shaft, J is the polar moment of inertia of the shaft, G is the shear modulus of elasticity of the material, θ is the angle of twist of the shaft, and L is the length of the shaft between the points where the torque is applied.
For the first section of the shaft between points B and C, we can calculate the polar moment of inertia using the formula for a solid circular shaft:
J = (π/32) × ([tex]d^4[/tex])
where d is the diameter of the shaft. Plugging in the values given, we get:
J = (π/32) × [tex](50 mm)^4[/tex] = 6.34×[tex]10^6[/tex] [tex]mm^4[/tex]
The length of this section is given as 300 mm, and the torque applied is 40 Nm. Therefore, we can calculate the angle of twist using the torsion equation:
θ = TL/JG
= (40 Nm)(300 mm)/(6.34 × [tex]10^6[/tex] [tex]mm^4[/tex])(77 GPa)
= 0.000293 rad or 0.0168 degrees
For the second section of the shaft between points C and D, we can use the same formula to calculate the polar moment of inertia, but the length and torque are different:
J = (π/32) × [tex](50 mm)^4[/tex] = 6.34×[tex]10^6[/tex] [tex]mm^4[/tex]
L = 600 mm, T = 200 Nm
θ = TL/JG
= (200 Nm)(600 mm)/(6.34 × [tex]10^6[/tex] [tex]mm^4[/tex])(77 GPa)
= 0.00294 rad or 0.168 degrees
For the final section of the shaft between points D and A, we again use the same formula, but with different length and torque values:
J = (π/32) × [tex](50 mm)^4[/tex] = 6.34×[tex]10^6[/tex] [tex]mm^4[/tex]
L = 600 mm, T = 800 Nm
θ = TL/JG
= (800 Nm)(600 mm)/(6.34×[tex]10^6[/tex] [tex]mm^4[/tex])(77 GPa)
= 0.0118 rad or 0.677 degrees
The total angle of twist of the shaft from end A to end B is simply the sum of the angle of twists for each section:
θ_total = θ_BC + θ_CD + θ_DA
= 0.000293 rad + 0.00294 rad + 0.0118 rad
= 0.0150 rad or 0.859 degrees
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The question is -
The 50-mm-diameter a992 steel shaft is subjected to the torques shown. determine the angle of twist of the end a.
Complete the following statement: The polarization direction of an electromagnetic wave is determined by the wavelength of the electromagnetic radiation. the direction of the magnetic field component the direction of the electric field component the direction the wave is traveling. the frequency of the electromagnetic radiation.
The polarization direction of an electromagnetic wave is determined by the direction of the electric field component.
What is an electric field ?
Electromagnetic waves consist of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of the wave's propagation. The direction of the electric field component determines the polarization direction of the wave. The electric field component oscillates perpendicular to the direction of propagation and determines the orientation of the electromagnetic wave.
In contrast, the wavelength, frequency, and direction of travel of the electromagnetic wave do not affect the polarization direction of the wave. However, the wavelength and frequency of the wave are related to its energy and momentum.
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Complete statement is: The polarization direction of an electromagnetic wave is determined by the direction of the electric field component.
Henry knocked a book off a bookshelf. The book fell to the ground. So did the gravitational energy for that increase, decrease, or stay the same?
Answer:
Explanation:
As the book fell to the ground, its potential energy decreased, and its kinetic energy increased. The total energy (potential energy + kinetic energy) of the book remained constant as per the Law of Conservation of Energy. Therefore, the gravitational potential energy of the book decreased, and the kinetic energy increased, resulting in a transfer of energy from potential to kinetic energy. Therefore, the gravitational energy decreased.
to convert from mass of a to liters of b in a stoichiometry problem, which are the correct steps to follow? luoa
The volume of B can be calculated as follows: Volume of B = Mass of B / Density of B
When converting from mass of A to liters of B in a stoichiometry problem, the following steps must be followed:
Step 1: Write a balanced chemical equation representing the reaction between A and B.
Step 2: Calculate the molar mass of A and B.
Step 3: Convert the given mass of A to moles of A using the molar mass of A.
Step 4: Use the stoichiometry of the balanced chemical equation to determine the number of moles of B that can be produced from the number of moles of A.
Step 5: Convert the number of moles of B to the volume of B in liters using the molar volume of a gas at standard temperature and pressure or the density of a liquid or solid.
Step 1: Write a balanced chemical equation representing the reaction between A and B. The balanced chemical equation can be written as:
`nA + mB → xC + yD`Step
Step 2: Calculate the molar mass of A and B. Molar mass is the mass of one mole of a substance. It is expressed in grams per mole. Therefore, the molar mass of A and B can be calculated using their atomic masses.
Step 3: Convert the given mass of A to moles of A using the molar mass of A.
Moles of A = Mass of A / Molar mass of A
Step 4: Use the stoichiometry of the balanced chemical equation to determine the number of moles of B that can be produced from the number of moles of A. The stoichiometry of the balanced chemical equation relates the number of moles of reactants to the number of moles of products. The stoichiometric coefficient of A and B indicates the number of moles of each that are required to react. Therefore, the number of moles of B produced can be calculated as follows:
Number of moles of B = Number of moles of A x Stoichiometric coefficient of B/Stoichiometric coefficient of A
Step 5: Convert the number of moles of B to the volume of B in liters using the molar volume of a gas at standard temperature and pressure or the density of a liquid or solid. The molar volume of a gas at standard temperature and pressure (STP) is 22.4 L/mol. Therefore, the volume of B can be calculated as follows:
Volume of B = Number of moles of B x 22.4 L/mol
If B is a liquid or solid, its density can be used to convert the number of moles to volume.
The density of B is given in units of g/mL or g/cm³.
Therefore, the volume of B can be calculated as follows:
Volume of B = Mass of B / Density of B
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why big tractor can plough many fields than small tractor
A big tractor is more efficient and productive than a small tractor, allowing it to plow through more fields and cover more ground with less time and effort.
A big tractor can plow many fields than a small tractor due to several reasons:Engine Power: Big tractors have larger and more powerful engines than small tractors, which allow them to generate more torque and power to pull heavy loads and work for longer periods of time without overheating or breaking down. This means they can work more efficiently and cover more ground than small tractors.
Size and Weight: Big tractors are usually larger and heavier than small tractors, which gives them more stability and traction on the ground. This allows them to plow through tough and uneven terrain with less effort and more control, reducing the time and effort needed to complete the task.
Implements: Big tractors can accommodate larger and more advanced implements, such as wider plows, cultivators, and seeders, which allow them to cover more ground with each pass. These implements can also be customized to match the specific needs of the soil and crops, increasing the efficiency and productivity of the tractor.
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Find the equivalent resistance of the combination shown in Figure 4, assuming that
R5 = 17 Ω and R6 = 26 Ω.
Answer:
Explanation:
R/^5*r^6 Ok so then this is simple once u get the answer u need to use the given formula in order to plug in the numbres sorry .
So basically
12 x r^6(u must fill in the number s ) and then u need to do `13x14xr the answer and use the rest of the numbers in order to figure out the quantities of each side for the shape . Then ur answer would be the r^x + x = ???
So yeah hope this helped
I think
Kind of
K Thanks Bye
Help please! View attachment below
Answer:
it is A
Explanation:
which of the following would have the strongest magnetic field. assume the current in each is the same
Answer: Neodymium
Explanation: Neodymium is the strongest magnet. It is an alloy made from iron and boron. is the strongest magnet.
The strength of the magnetic field around the coil can be increased by increasing the current flowing through the coil (this will increase the flux) or by increasing the number of coil turns. which will also increase the flux Φ.
at the poles
The magnetic field around a magnet is the strongest at the poles. The maximum number of magnetic field lines pass through the poles.
A 2000 kg truck moving at 10 m/sec to the right strikes a 500 kg car moving to the left with a velocity of 20 m/s. If the two bodies stick together and moving to the right after the collision, what is the final velocity of the combined mass?
The final velocity of the combined mass after the collision is 15 m/s to the right.
This can be calculated using the equation for Conservation of Momentum.
The momentum of the combined mass before the collision is the sum of the momentums of the truck and car individually:
Momentum of Truck = 2000kg x 10 m/s = 20000 kgm/s
Momentum of Car = 500 kg x 20 m/s = 10000 kgm/s
Total Momentum before Collision = 30000 kgm/s
The total momentum after the collision is the same as before, so the final velocity of the combined mass is:
Final Velocity = Total Momentum/Combined Mass
Final Velocity = 30000 kgm/s / 2500 kg
Final Velocity = 15 m/s
therefore, the final velocity is 15 m/s.
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Three loads are applied attached at B and D. Neglecting the weight of the beam, determine the range of values of Q for which neither cable becomes slack when P = 0. as shown to a light beam supported by cables 7.5 kN Q P С E А В 1.5 m- 0.75 m 0.5 m 0.75 m Fig. P4.9
When[tex]P = 0, Q[/tex]must be in the range between [tex]4.3 kN and 12.9 kN[/tex] to prevent either cable from becoming slack.
We may examine the forces operating on the beam to find the range of values for Q. The sum of the vertical forces must be zero when [tex]P = 0,[/tex]which indicates that the beam is in equilibrium. Our result is the equation:
[tex]Q + 7.5 - 3 - 4 = 0[/tex]
When Q is solved for, we obtain [tex]Q = 0.5 kN to 12.9 kN.[/tex] To prevent either wire from going slack, we must also ensure that both cables are under positive stress. We can accomplish this by searching for the extreme values of Q in each cable's tensions.
[tex]Q = 0.5 kN[/tex]results in a positive 7.5 kN tension in cable AB. However, cable DE's tension is negative[tex](-2.5 kN)[/tex], indicating that cable DE is under tension. is loose.
[tex]Q = 12.9 kN[/tex] results in a positive [tex]3.4 kN[/tex] tension in cable DE. Cable AB, however, has negative tension [tex](-5.4 kN),[/tex] indicating that it is slack.
The range of Q values that satisfy the requirement that neither cable sags when [tex]P = 0 is 4.3 kN to 12.9 kN.[/tex]
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Explain newton's second law in terms of momentum
A beam consisting of five types of ions labeled A, B, C, D, and E enters a region that contains a uniform magnetic field as shown in the figure below. The field is perpendicular to the plane of the paper, but its precise direction is not given. All ions in the beam travel with the same speed. The table below gives the masses and charges of the ions. Note: 1 mass unit = 1.67 x 10â€"27 kg and e = 1.6 x 10â€"19 C
Which ion falls at position 2?
At position 2, ion B falls. It is less deflected because it has a lesser mass than ions C, D, and E and the same charge as ion A.
A force perpendicular to the charged particle's velocity and the magnetic field's direction is applied when it reaches the magnetic field. The right-hand rule asserts that the palm will face the direction of the force if the thumb of the right hand points in the direction of the particle's velocity and the fingers point in the direction of the magnetic field. The particle's charge, velocity, and magnetic field intensity all affect how much force is generated.
Since all ions are moving at the same speed in this scenario, the force exerted on each ion is proportional to its charge to mass ratio. Ion B has the smallest mass of all the ions, so the least force and is least deflected of the ions, falling at position 2.
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Which of the following techniques is the key factor in a telescope that uses adaptive optics to correct for atmospheric distortion of images, or seeing? O Computer-controlled motors rapidly adjust the orientation and position of the separate primary mirrors in a multiple-mirror telescope (MMT). O A corrector lens compensates for image distortion by electronic control of its shape. O Computer-controlled motors adjust the position and shape of one of the small mirrors within the optics many times per second. The light rays are focused electronically, without the use of lenses or mirrors.
The technique that is the key factor in a telescope that uses adaptive optics to correct for atmospheric distortion of images, or seeing is: Computer-controlled motors adjust the position and shape of one of the small mirrors within the optics many times per second.
Adaptive optics is a technology used to improve the performance of optical systems by reducing the effect of wavefront distortions by adjusting for distortions in real-time. Adaptive optics compensate for these distortions by removing the wavefront distortion from the incoming light and returning an undistorted image to the detector. This technique is especially helpful for telescopes that use optics to observe astronomical objects.
In a telescope, Adaptive optics involves two main components:
a wavefront sensor and a wavefront corrector. The wavefront sensor measures the wavefront distortion and sends this information to the wavefront corrector, which changes its shape to correct for the distortion.The technique that is the key factor in a telescope that uses adaptive optics to correct for atmospheric distortion of images, or seeing is Computer-controlled motors adjust the position and shape of one of the small mirrors within the optics many times per second.
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diagram below shows some of the forces acting on a car of mass 800 kg.
a. State the size of the total drag force when the car is travelling at constant speed.
b. The driving force is increased to 3200 N.
i. Find the resultant force on the car at this instant.
ii. Write down, in words, the equation connecting mass, force and acceleration.
iii. Calculate the initial acceleration of the car.
c. Explain why the car will eventually reach a new higher constant speed.
Answer:
Without a diagram or image, it's difficult to answer this question accurately. However, I can provide a general answer based on the information given.
a. When a car is traveling at constant speed, the net force acting on the car is zero. Therefore, the total drag force acting on the car must be equal in magnitude to the driving force provided by the engine.
b. i. The resultant force on the car when the driving force is increased to 3200 N can be calculated as follows:
Resultant force = Driving force - Drag force
Since the drag force is still equal in magnitude to the driving force (as the car is still moving at a constant speed), the resultant force is zero.
Resultant force = 3200 N - 3200 N = 0 N
ii. The equation connecting mass, force, and acceleration is:
Force = mass x acceleration
This can be rearranged to find acceleration:
Acceleration = Force / mass
iii. To calculate the initial acceleration of the car, we can use the equation above:
Acceleration = 3200 N / 800 kg = 4 m/s²
c. The car will eventually reach a new, higher constant speed because the driving force provided by the engine is now greater than the drag force acting on the car. This means there is a net force acting on the car, causing it to accelerate. As the car accelerates, its speed increases and the drag force acting on the car increases as well. Eventually, the drag force will once again be equal in magnitude to the driving force, and the car will reach a new, higher constant speed where the net force acting on the car is once again zero.
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The capacitor in the figure has a capacitance of 27 µF and is initially uncharged. The battery provides a potential difference of 116 V. After switch S is closed, how much charge will pass through it?
The charge that passes through the capacitor is 3.132 mC (milli Coulombs). Therefore, option B. 3.132 mCis the correct answer.
The circuit shown below is a simple circuit consisting of a battery, a capacitor, and a switch.
The capacitance of the capacitor is 27 µF, and it is initially uncharged. After switch S is closed, how much charge will pass through it?
Circuit diagram with a capacitor
The expression for the amount of charge (Q) that passes through the capacitor is
Q = CΔV,
where, C is the capacitance of the capacitor and
ΔV is the potential difference between the plates of the capacitor.
Q = CΔV = (27 × 10-6 F)(116 V)
Q = 3132 × 10-6 C
Q = 3.132 mC
The charge that passes through the capacitor is 3.132 mC (milli Coulombs).
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what is the formula for finding the magnetic filed strength at a point due to a current-carrying wire
Answer:
The strength of the magnetic field created by current is:
B=μ₀I / 2 π R
where I is the current
R is the shortest distance to the wire
The constant μ₀ is 4π * 10^-7 T * m / s
Explanation:
when a ray of light hits a surface, the angles made by the reflection and refraction of the ray must all be measured from the normal, which is
When a ray of light hits a surface, the angles made by the reflection and refraction of the ray must all be measured from the normal, which is perpendicular to the surface at the point where the light ray hits it.
Reflection occurs when light rays hit a surface and bounce back whereas Refraction, occurs when light travels through a medium of a different density or refractive index.
The laws of reflection and refraction states that the angle of incidence is equal to the angle of reflection, and the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant. This ratio is known as the refractive index of the material from where the light is passing through.
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5.32 calculate ix and vo in the circuit of fig. 5.70. find the power dissipated by the 60-k resisto
The power dissipated by the 60-k Ohm resistor is 3 mv and 24mv.
[tex]=V_1=V =4mv\\=I_{iN}=\frac{4mv}{10k}=0.4\mu A\\= \frac{V_1 - V+}{50k}=0.4\mu A\\V_1 - 4m= 20m\\V_1 = 24mv[/tex]
[tex]i_x=\frac{V_1}{20+(6 || 3)} =\frac{24*10^{-3}}{(20+2.857)*10^{3}}\\i_x=1.05\mu A\\i_0=\frac{i_x*60}{60+3}=1\mu A\\V_0=3k*1\mu=3mv\\V_0=3mv[/tex]
An Ohm resistor is a passive electrical component that restricts the flow of current in an electrical circuit. It is named after Georg Simon Ohm, a German physicist who discovered Ohm's law which states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points.
An Ohm resistor has a resistance value measured in ohms, which determines how much it restricts the flow of current. The higher the resistance value, the more it restricts the current flow. Ohm resistors are commonly used in electronic circuits to control the voltage and current levels, and to protect sensitive electronic components from damage. They can also be used to divide voltages, as voltage dividers, or as current limiting devices.
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Complete Question: -
Calculate i_x and v_o in the circuit of Fig. 5.70. Find the power dissipated by the 60-k Ohm resistor.
an electron is moving parallel to an electric field (from higher to lower voltage). its potential energy is
The potential energy of an electron moving parallel to an electric field decreases as it moves from higher voltage to lower voltage. The work done by the electric field on the electron is equal to the decrease in potential energy. The potential energy of the electron is proportional to its charge and the voltage difference between the two points.
When an electron moves parallel to an electric field, its potential energy is conserved. The potential energy of an electron is proportional to its charge and the voltage through which it moves. As the electron moves from higher voltage to a lower voltage, its potential energy decreases. The work done by the electric field on the electron is equal to the decrease in potential energy. When the electron is at rest, it has a certain potential energy due to its position in the electric field. If the electron is allowed to move freely, it will accelerate towards the lower voltage region, gaining kinetic energy. As it moves, the electric field continues to do work on the electron, converting its potential energy into kinetic energy. If the electric field is uniform, the potential energy of the electron will be given by the equation U = -qV, where q is the charge of the electron and V is the voltage difference between the two points. The negative sign indicates that the potential energy decreases as the voltage difference decreases.
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lonie is being pulled from a snake pit with a rope that breaks if tension in it exceeds 755N. If one has a mass of 70kg and the snake pit is 3 Am deep, what is the minimum time necessary to pull out lonie?
The minimum time required to pull out lonie from the snake pit is √(3/4) seconds.
Given: Mass, m = 70 kg Distance, d = 3 m Limiting tension, T = 755N
The minimum time required to pull out lonie from a snake pit, t
Given, mass, m = 70 kg Acceleration due to gravity, g = 9.8 m/s²Distance, d = 3 m
Let's assume the minimum time required to pull out lonie from a snake pit is t.
So, using the equation of motion,S = ut + 1/2 at²
Here, S = d = 3m (Distance),u = 0 m/s (Initial velocity),a = g = 9.8 m/s² (Acceleration) and t = time
Substituting the above values in the equation, we get3 = 0 + 1/2 × 9.8 × t² => t² = 3/4 => t = √(3/4) sec
Also, we know that the tension in the rope is given byT = mg + ma
Now, the rope will break when T exceeds 755 N.
So, substituting the values of m, g, and a in the above equation, we getT = mg + ma = 70 × 9.8 + 70 × a
Since the tension in the rope should be less than or equal to 755 N, we have70 × 9.8 + 70 × a ≤ 755 => a ≤ (755 - 70 × 9.8)/70=> a ≤ 3.29 m/s²
Therefore, the minimum time required to pull out lonie from the snake pit is √(3/4) seconds.
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A heavy load was elevated to a height of 12 in 25 of uniform motion using a lifter developing an average power of 1.2 . What was the mass of the lifted object?
The mass of the lifted object, given the height the heavy load was elevated to and average power is 1, 013.85 kg.
How to find the mass ?To calculate the mass of the lifted object, we can use the work-energy principle, which states that the work done on an object is equal to its change in gravitational potential energy.
Calculate the work done by the lifter:
Power (P) = 1.2 kW = 1200 W (converting from kilowatts to watts)
Time (t) = 25 seconds
Work (W) = Power × Time = 1200 W × 25 s = 30,000 J (joules)
Calculate the change in gravitational potential energy:
Height (h) = 12 in = 12 × 0.0254 m = 0.3048 m (converting from inches to meters)
Gravitational acceleration (g) = 9.81 m/s²
Solve for mass (m):
Since the work done is equal to the change in gravitational potential energy, we have:
30,000 J = m × 9.81 m/s² × 0.3048 m
Now, we can solve for the mass:
m = 30,000 J / (9.81 m/s² × 0.3048 m) = 1, 013.85 kg
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125cm³ of a gas was collected at 15 °C and 755 mm of mercury pressure. Calculate the volume of the gas that will be collected at standard temperature and pressure
Answer:
119,2 см³
Explanation:
по формуле Клопейрона (P1×V1):T1=(P2×V2):T2
если из этой формулы найти V2, ответ будет равен примерно на 119,2 см³
