Mass of the lead that should be placed so that the top of the cube will be just level with the water surface will be 2.8 kg.
What does buoyancy mean?The term "buoyancy" refers to the upward push a liquid applies to an item submerged in it. An upward force is imposed on an object when you try to submerge it in water, and this force grows as the object is pushed deeper.
How to solve the complete question?Let's assume that the system is in equilibrium,
now, F = force due to gravity
B = buoyant force
L = length of cube
d = density
M = mass of lead
F = B - Mwood×g - M×g
at equilibrium, F=0
B = dwater×L³×g
L³= volume of water displaced
0 = dwater×L³×g - Mwood×g - M×g
d = Mass/ Volume
dwater×L³ - dwood×L³ - M = 0
M = (dwater - dwood) L³
M = (1 - 0.65) (20)³
M = 2.8 kg
Thus, the mass of lead that should be placed on the cube so that the top of the cube will be just level with the water surface will be 2.8 kg.
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The complete question is,
A cube of wood an edge dimension of 20.0 cm and a density of 650kg/m³ floats on water. What mass of lead should be placed on the cube so that the top of the cube will be just level with the water surface?
The units of work in the metric system are:
foot-pound
newton-pound
pound-meter
gram-meter
newton-meter
Answer:
newton-meter
Explanation:
Work is force times distance.
Force is measured in Newtons, Distance is measured in meters
So Work is measured in Newton*Meters
Answer:
Newton-meter
Explanation:
The newton-meter serves as the unit of measurement for work in the metric system. One newton-meter of work is completed when a weight is elevated one meter in height. Additionally, 6 newton-meters of work are accomplished when 3 newtons are lifted 2 meters.
Dolphins, bats, and other animals use echolocation to determine the location of objects. How do blind people use echolocation to detect objects in their environment? What types of technologies and tools would be helpful?
Answer: Clicking sounds and clicking tools + hearing devices to help hear the clicks in loud situations
Explanation:
Some blind people have developed the ability to make clicking noises, either with their mouth or a clicker, and they can listen for the sound of it bouncing off objects around them. Based on the tone, volume, and depth of the click, these people can tell the distance, size, and sometimes material of an object. A clicking device would be a tool that is helpful, as well as any hearing aid that could allow the wearer to hear the clicks better or clearer in a loud environment. (Note: the sound could be anything. It does not have to be a click. Whistles, beeps, chirps, and other sounds also can work for people.)
a current of 11 amps at 240 volts flows through an electric range. if it is user an average of 1 hour/day Calculate the kwhr used per week.
The kWh used per week by the electric range whose voltage and current is 240 V and 11 A respectively is 18.48 kWh.
What is electric kilowatt-hour (kWh)?
A kilowatt-hour is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ).
To calculate the kWh per week of the electric range, we use the formula below.
Formula:
E = VIt/1000...............Equation 1Where:
E = Electric energy in kWh per week V = VoltageI = Currentt = Total timeFrom the question,
Given:
V = 240 VI = 11 ampst = 1 hour per day = 1×7 = 7 hours per weekSubstitute these values into equation 1
E = 240×11×7/1000E = 18.48 kWhHence, the kWh used per week is 18.48 kWh.
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newton's second law in 1 dimension: what magnitude net force is required to accelerate a 1200-kg car uniformly from 0 m/s to 27.0 m/s in 10.0 s?
The required force is F = 3240 N.
As a result,
1200 kg is the car's mass.
Initial speed of the vehicle, u = 0.
The car's final speed is 27 meters per second.
Thus we have to first calculate the acceleration and then substitutes its value in the force formula
Taking time, t = 10 s
F = m a, where a represents the vehicle's acceleration, is the formula for the required force.
a= v - u / t
thus a = 27 - 0/ 10
a = 27/ 10
F = 1200 X 27 / 10
F = 3240 N.
Therefore, this is the necessary solution.
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to meet a u.s. postal service requirement, footwear must have a coefficient of static friction of 0.525 or more on a specified tile surface. a typical athletic shoe has a coefficient of 0.785. in an emergency, what is the minimum time interval in which a person starting from rest can move 2.85 m on a tile surface if she is wearing the following footwear?
A minimal time period is required to accelerate through x=3.00m because maximal static friction produces the force that creates maximum acceleration.
Explain what an acceleration is.acceleration is the rate of change in both direction and speed of velocity over time. When anything moves faster or slower in a straight line, it is said to have been accelerated. Because of direction is always shifting, motion on a circle accelerates even while the speed is constant.
A person moves by the help of frictional force, as a result of gtound reaction. So, the formula for frictional force is:
F = μR
where,
F = frictional force
μ = coefficient of friction
R = Normal Reaction = Weight of Body = W = mg
Therefore,
F = μmg
but, from Newton's 2nd Law of Motion:
F = ma
Comparing both equations, we get:
μmg = ma
a = μg ---------- equation (1)
Now, to calculate the distance moved by a body, we use 2nd equation of motion:
s = (Vi)(t) + (0.5)at²
using equation (1), we get:
s = (Vi)(t) + (0.5)μgt²
where,
s = distance moved by body
Vi = initial velocity of body
t = time taken to cover the distance
g = acceleration due to gravity
(a)
Vi = 0 m/s
g = 9.8 m/s²
s = 3.2 m
μ = 0.5
t = ?
Therefore,
3.2 m = (0 m/s)(t) + (0.5)(0.5)(9.8 m/s²)t²
t² = 3.2 m/(0.5)(0.5)(9.8 m/s²)
t = √1.30612 s²
t = 1.14 s
(a)
Vi = 0 m/s
g = 9.8 m/s²
s = 3.2 m
μ = 0.5
t = ?
Therefore,
3.2 m = (0 m/s)(t) + (0.5)(0.5)(9.8 m/s²)t²
t² = 3.2 m/(0.5)(0.5)(9.8 m/s²)
t = √1.30612 s²
t = 1.14 s
(a)
Vi = 0 m/s
g = 9.8 m/s²
s = 3.2 m
μ = 0.87
t = ?
Therefore,
3.2 m = (0 m/s)(t) + (0.5)(0.87)(9.8 m/s²)t²
t² = 3.2 m/(0.5)(0.87)(9.8 m/s²)
t = √0.75 s²
t = 0.87 s
What are acceleration and speed exactly?The rate of change in displacement is known as velocity. Acceleration is the rate at which speed changes. The fact that velocity contains both magnitude and orientation makes it a vector quantity. Acceleration is also a vector quantity since it is simply the rate during which velocity varies.
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suppose the gravitational acceleration at the surface of a certain moon a of jupiter is 2 m/s2. moon b has twice the mass and twice the radius of moon a. what is the gravitational acceleration at its surface? neglect the gravitational acceleration due to jupiter.
Neglecting the gravitational acceleration due to jupiter , the gravitational acceleration at the surface of moon b is 8 m/s².
The gravitational acceleration at the surface of the moon is determined using the equation G*M/r^2, where G is the gravitational constant, M is the mass of the object, and r is the radius of the object.
Calculate the gravitational acceleration at the surface of moon a, using the equation for gravitational acceleration:
g = G * M / r2
where G is the gravitational constant (6.67x10-11 Nm2/kg2), M is the mass of the moon, and r is the radius of the moon.
g = 6.67x10-11 Nm2/kg2 * M / r2
g = 6.67x10-11 Nm2/kg2 * (mass of moon a) / (radius of moon a)2
g = 2 m/s2
Step 2: Calculate the gravitational acceleration at the surface of moon b, using the equation for gravitational acceleration:
g = G * M / r2
where G is the gravitational constant (6.67x10-11 Nm2/kg2), M is the mass of the moon, and r is the radius of the moon.
g = 6.67x10-11 Nm2/kg2 * (2 * (mass of moon a)) / (2 * (radius of moon a))2
g = 8 m/s²
Therefore, the gravitational acceleration at the surface of moon b is 8 m/s².
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what would most likely happen if coastal north carolina increased implementation of wind energy?
The option that is more likely to happen if coastal north Carolina increased implementation of wind energy is The production of greenhouse gases would decrease.
A gas that produces the greenhouse effect by both absorbing and emitting radiant radiation in the thermal infrared range is referred to be a greenhouse gas. The five main greenhouse gases in the atmosphere of Earth are ozone, carbon dioxide, methane, and water vapor.
A renewable energy source is wind energy. It is non-polluting, never runs out, and reduces the demand for fossil fuels, which are the source of greenhouse gases that cause global warming.
By increasing the implementation of wind energy,
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a simple pendulum is 4.00 m long. (a) what is the period of small oscillations for this pendulum if it is located in an elevator accelerating upward at 6.00 m/s2?
The time period of the small oscillations for the simple pendulum is found to be 3.14 seconds.
The pendulum is located in an elevator that is accelerating upwards with an acceleration of 6m/s² and length of the pendulum is 4m.
Because the elevator is accelerating in the upper direction the net acceleration of the pendulum will be (10 + 6)m/s².
The period of small accelerations for this pendulum will be given by the relation,
T = 2π(l/a)
Where, l is the length of pendulum and a is the net acceleration.
Putting values,
T = 2π(4/16)
T = 2π(1/2)
T = π seconds.
T = 3.14 seconds.
So, the time period of this small oscillations for this pendulum is 3.14 second.
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suppose a woman does 550 j of work and 9800 j of heat transfer occurs into the environment in the process. (a) what is the decrease in her internal energy (in kcal), assuming no change in temperature or consumption of food? (that is, there is no other energy transfer.) -10350 kcal (b) what is her efficiency (in percent)? %
W = -500 J is the work, which is why it's negative because a woman is doing it.
Briefing
The heat transfer into the system,
Q = 9500 J, makes it positive.
(a) Heat and work are added to determine the change in internal energy, which is:
ΔU = Q+W
We replace with:
ΔU = 9500 J-500 J
ΔU = 9000 J\s(b) (b) The quantity of useful work completed given a total energy supply is now what is generally referred to as an efficiency. From this, we may divide the woman's labour by the shift in internal energy, giving us
= 500 j / 9000 j.
We get:
ϵ = 0.0556~ 5.56%
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All living organisms are mainly composed of what elements? * 1 point A. Carbon, Phosphorus, Nitrogen, Oxygen, Potassium B. Calcium, Phosphorus, Nitrogen, Oxygen, Vibranium C. Oxygen, Carbon, Hydrogen, Nitrogen, Phosphorus D. Sodium, Carbon, Nitrogen, Hydrogen, Helium
All living organisms are mainly composed of the elements: Oxygen, Carbon, Hydrogen, Nitrogen, Phosphorus.
The correct answer choice is option c.
What are living organisms?Living organisms are those things that has life. They include plants and animals. Living organisms be it plants or animals are composed of important elements such as carbon, oxygen and others.
However, there are certain characteristic features which living organisms possess. Some of these characteristics of living things are as follows:
Movement: The ability of living organisms to move from one place to another or to move Its body parts. There are two major types of movement known in living organisms. These are: Active movementPassive movementOther characteristics of living organisms are:
RespirationNutritionIrritabilityGrowthExcretionReproduction AdaptationCompetitionIn conclusion, we can now confirm from above the explanation given above that living things are made up of certain elements.
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a uniform thin rod of length 0.50 m and mass 4.0 kg can rotate in a horizontal plane about its center. a 3.0 gram bullet hits the end of the rod (initially at rest) at an angle of 60 degrees and imbeds in the rod. if the angular speed of the rod is 10. rad/s after the bullet strikes, what is the speed of the bullet before it strikes the rod?
The speed of the bullet before it strikes the rod is 67 m/s. To determine the speed of the bullet before it strikes the rod, we need to consider the conservation of angular momentum.
The moment of inertia of a thin rod about its center is given by the following formula:
I = (1/3) * m * L^2where I is the moment of inertia, m is the mass of the rod, and L is the length of the rod.
Substituting the values given in the problem, we find that the moment of inertia of the rod is
(1/3) * 4.0 kg * (0.50 m)^2 = 0.67 kg*m^2.In this case, the bullet strikes the rod, transferring some of its linear momentum to the rod in the form of angular momentum. The change in angular momentum of the rod is equal to the angular momentum of the bullet.
We can use the conservation of angular momentum to write the following equation:
I1 * w1 + J = I2 * w2where I1 is the initial moment of inertia of the rod, w1 is the initial angular velocity of the rod, J is the angular momentum of the bullet, I2 is the final moment of inertia of the rod, and w2 is the final angular velocity of the rod.
Since the initial angular velocity of the rod is zero, we can simplify the equation as follows:
J = I2 * w2
Substituting the values given in the problem, we find that the angular momentum of the bullet is
0.67 kgm^2 * 10 rad/s = 6.7 kgm^2/s.To determine the speed of the bullet before it strikes the rod, we need to consider the bullet's mass and the angle at which it strikes the rod. The mass of the bullet is given as 3.0 grams, which is equivalent to 0.003 kg. The angle at which the bullet strikes the rod is given as 60 degrees.
We can use the following formula to calculate the speed of the bullet before it strikes the rod:
v = (J/m) * sin(theta)Substituting the values given in the problem, we find that the speed of the bullet before it strikes the rod is (6.7 kg*m^2/s / 0.003 kg) * sin(60 degrees) = 67 m/s. This is the final answer.
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3) A skateboarder lands on all four wheels after riding a railing. If the skateboarder
has a weight of 900 N and the area on the bottom of a single wheel is 0.0001 m2,
What pressure does the skateboard put on the ground?
Answer:
The pressure that skateboard put on ground is 2 250 000 Pa
Explanation:
We have,
Force (F)=900N, Area of single wheel=0.0001m2 but skateboard has four wheels so required area=0.0001x4
P = F/A Area = 4 wheels x 0.0001 m2 = 0.0004 m2 P = 900 N / 0.0004 m2 = 2 250 000 Pa=2250 kPa
Have you ever questioned the need for such sharp knives or the pointy ends on our nails? The idea of pressure holds the answers to each of these queries. It is the ratio between the force being applied and the surface area being applied to. The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. The SI unit of pressure is the pascal (Pa).
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PLEASE HELP I PAY 88 POINTS AND THANK YOU AND BRAINLIEST
Instructions: Answer the following questions in the space provided. Be sure to write your responses in complete sentences.
A father pushes his daughter and son on a sled down a hill.
Part A: Other than the force exerted by the father pushing the sled, identify two additional forces that act on the sled as it travels from the top of the hill to the bottom. (2 pts)
Part B: Explain how each force you identified in Part A will affect the motion of the sled. (2 pts)
Answer: Down below is the answer in complete sentences!
Explanation:
PART A:
Gravity and Acceleration are two additional forces acting upon the sled.
PART B:
Gravity will affect the sled by pulling it down, since the slope of the hill is negative.
Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.
boat moves north at a velocity of 2.5 m/s while the current moves downstream at 6.0 m/s east. What is the resultant velocity of the boat, relative to an observer on the shore?
A) 4.5 m/s, NE
B ) 4.5 m/s, SE
C ) 6.5 m/s, NE
D ) 6.5 m/s, SE
E) 8.5 m/s, NE
Relative to the observer in on the shore, the velocity of the boat is 6.5 m/s, NE.
What is relative velocity?
The velocity of an object in relation to another observer is known as its relative velocity.
We cay say that the relative velocity is equal to the vector difference between the velocities of two objects. The relative velocity of A with respect to B= velocity of the body A – velocity of the body B.
The diagram below shows the calculation where AC is relative speed, AB is speed of the boat and BC is the speed of stream.
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what are the magnitude and location (with respective to point a) of the resultant force on the horizontal gate? the gate width is w. fluid density is r. you can leave your answer in terms of variables (w, r, and g).
The magnitude and location of the resultant force on the horizontal gate is: F = w * r * g, and Point A.
What is magnitude?Magnitude is a measure of the size or intensity of a physical quantity. It is usually defined as the absolute value of the numerical value of the physical quantity, and is often expressed in terms of a unit of measurement. Magnitude can refer to a variety of different physical quantities, such as size, intensity, brightness, or energy. Magnitude can also refer to the relative size or intensity of two or more physical quantities, when compared to each other.
The resultant force on the horizontal gate is equal to the sum of the hydrostatic forces acting on the gate.
Since the gate is horizontal, the hydrostatic forces acting on the gate will be equal to the pressure difference between the top and bottom of the gate.
This pressure difference is equal to the product of the fluid density, gravitational acceleration, and the gate width.
Therefore, the magnitude of the resultant force on the gate will be:
F = w * r * g
The location of the resultant force on the gate will be at the center of the gate, which is point A.
Therefore, the magnitude and location of the resultant force on the horizontal gate is: F = w * r * g, and Point A.
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What is the primary classification trait used to explain how scientists divide rocks into the three classification groups?
a. Composition
b. Formation
c. Location
d. Texture
Composition and texture is the primary classification trait used to explain how scientists divide rocks into the three classification.
How are rocks divided into the three classification groups by scientists?Rocks can be categorized in one of two ways: first, according to the processes by which they form, with rocks being categorized as either sedimentary, igneous, or metamorphic. Grain or crystal size is another common way to categorize rocks.
Two criteria—texture and composition—are used to categorize rocks. The sizes, shapes, and relationships between the various mineral grains and other components that make up a rock are what determine its texture. The process that created the rock controls these elements.
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what is the equation describing the motion of a mass on the end of a spring which is stretched 8.8 cm from equilibrium and then released from rest, and whose period is 0.66 s ? assume that the displacement at the start of the motion is positive.
The equation for the motion of a mass on the end of a spring with a period of 0.66 seconds and a stretch of 8.8 cm from equilibrium is
y = (8.8cm)cos(3πt).
What is the mathematical formula for the mass's motion?Newton's second law, which states that the force acting on a body is equal to that force multiplied by the acceleration of the center of mass of that body, or F = ma, is the basic equation of motion in classical mechanics.
As we are aware, the SHM equation is as follows:
y = Acos(ωt)
Here, we are aware of
ω = 2π/T
Here it is
T = 0.66s
now that we
ω = 2π/0.66
ω = 3π
We now have
y = (8.8cm)cos(3πt).
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a 20 n force is applied to a 0.5 kg mass at an angle of 60o above the horizontal. find the acceleration of the mass along the smooth horizontal surface.
The acceleration of the mass along the smooth horizontal surface is 20 m/s².
What is acceleration?Acceleration is the rate of change of velocity.
To calculate the acceleration of the mass along the smooth horizontal surface, we use the formula below
Formula:
a = Fcos∅/m.................... Equation 1Where:
a = Acceleration of the massF = Force applied to the massm = Magnitide of the mass∅ = Angle to the horizontalFrom the question,
Given:
F = 20 N∅ = 60°m = 0.5 NSubstitute these values into equation 1
a = (20×cos60°)/0.5a = 20×0.5/0.5a = 20 m/s²Hence, the acceleration of the mass is 20 m/s².
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children in a tree house lift a small dog in a basket 4.75 mm up to their house. part a if it takes 221 jj of work to do this, what is the combined mass of the dog and basket?
The combined mass of the dog and basket is 4750 kg.
To determine the combined mass of the dog and basket, we can use the equation for work, which is defined as the product of the force applied and the distance over which the force is applied. In this case, the force applied is the weight of the dog and basket, and the distance over which the force is applied is the height of the tree house, 4.75 mm.
The equation for work can be written as follows:
W = F * dwhere W is the work done, F is the force applied, and d is the distance over which the force is applied.
Substituting the values given in the problem, we get the following equation:
221 J = F * 4.75 mm
To solve for the force F, we need to convert the distance from millimeters to meters. We can do this by dividing the distance by 1000:
221 J = F * 4.75 mm / 1000 m/mm
= F * 0.004750 m
Solving for the force F, we get:
F = 221 J / 0.004750 m
= 46600 N
The force F is equal to the weight of the dog and basket. The weight of an object is equal to its mass multiplied by the acceleration due to gravity, which is 9.8 m/s^2. Therefore, the combined mass of the dog and basket is:
m = F / g
= 46600 N / 9.8 m/s^2
= 4750 kg
This is the final answer.
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which type of wave has a wave perpendicular to the disturbance?responses surface surface longitudinal longitudinal mechanical mechanical transverse
The disruption of a transverse wave propagates perpendicular to the direction of propagation.
Depending on the type of motion they experience, mechanical waves can either be transverse or longitudinal. It should be emphasized that transverse and longitudinal waves can both have periodic behavior.
Transverse wave: what is it?
An oscillating wave that moves in the opposite direction of its oscillations is referred to as a transverse wave in physics. On the other hand, a longitudinal wave travels in the direction of its oscillations. Water waves are transverse waves.
A transverse wave is what sort of wave?
Transverse waves include phenomena like string vibrations and sea surface ripples. The slinky may be swung horizontally up and down to produce a transverse wave. A longitudinal wave's particles are scattered perpendicular to the direction that the wave is moving.
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Which choice below explains what is happening in a liquid as it turns into a gas?
a. The particles speed up and spread apart
b. The particles speed up and come closer together
c. The particles slow down and spread apart
d. The particles slow down and come closer together
a. The particles speed up and spread apart, in a liquid as it turns into a gas.
How do particles flow in gases and liquids?Particles in liquids are dispersed randomly across the container and are relatively near to one another. Due to the closer proximity of the particles, collisions between them happen more frequently than in gases even if particles are moving quickly in all directions.
What two characteristics separate liquid from gas?A liquid has a fixed shape and volume as opposed to a gas, which is how they differ from one another. While a liquid keeps a consistent volume, a gas adopts the shape of its container. Additionally, gas is more compressible than liquid. This implies that a gas can be compressed into a smaller area than a liquid.
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based on its surface temperature of 6,000 k, most photons that leave the sun's surface lie in which region of the electromagnetic spectrum?
Most photons that leave the sun's surface have a surface temperature of 6,000 K, which corresponds to the visible light region of the electromagnetic spectrum.
The electromagnetic spectrum is a continuous range of wavelengths and frequencies that includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. The wavelengths and frequencies of these different types of electromagnetic radiation are all different and correspond to different regions of the spectrum.
The visible light region of the electromagnetic spectrum is the portion of the spectrum that can be seen by the human eye. It ranges from about 400 nanometers (nm) to about 700 nm in wavelength, and corresponds to frequencies of about 7.5 x 10^14 Hz to about 4.3 x 10^14 Hz. Photons with wavelengths and frequencies in this range have enough energy to excite the photoreceptors in the human eye, allowing us to see them.
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Please help this is urgent
Consider a planet and an asteroid in the solar system. Both their orbits can be considered as a circle. Their distance to the center of the sun differ by a factor of 4. rB = 4 rA
When r increases by a factor of 4, how do period T, angular velocity ω, and linear speed v change respectively?
1. [tex]T_{B}[/tex] = ___ [tex]T_{A}[/tex]
2. [tex]\omega_{B}[/tex]=___[tex]\omega_{A}[/tex]
3. [tex]v_{B}[/tex] = ___[tex]v_{A}[/tex]
A particle moving in a circle has a linear velocity that is related to its angular velocity by the relationship r/r, where r is the radius, based on our understanding of circular motion.The most significant actions must be taken by the person on the outside.
What angular velocity ω, and linear speed v respectively?While linear speed v increases with radius, angular speed does not. For instance, to maintain line with the rest of the marching band, the individual on the outside must take the biggest steps.
Therefore, Every particle with a rigid body is subject to the relation v/ r = at any given time.
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197) a submarine in neutral buoyancy is 100 m below the surface of the water. what air pressure must 197) be supplied to remove water from the ballast tanks in order for the submarine to surface?
Air pressure must be supplied to remove water from the ballast tanks is 9.8*105 N/m^2.
Buoyancy is the upward force exerted by a liquid that opposes the weight of a partially or fully submerged object. In a liquid column, the pressure increases with depth due to the weight of the liquid above. Therefore, the pressure at the bottom of the liquid column is higher than the pressure at the top of the column. Similarly, the pressure at the bottom of an object immersed in liquid will be greater than at the top of the object. A pressure differential results in a net upward force on an object. The magnitude of the force is proportional to the pressure difference and corresponds to the weight of the liquid (as explained by Archimedes' principle). This is the displaced liquid that would otherwise occupy the underwater volume of the object.
We know that pressure below the surface of water is P1 = Po +hdg
pressure at the surface of water is P2 = Po
Then pressure difference is P = P1 -P2 = hdg
h = depth = 100 m
d = density of water = 1000 kg/m3
g = 9.8 m/s2
Then P = 100*1000*9.8 = 9.8*105 N/m^2
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a car is traveling at 30 km per hour. a bug hits the windscreen and goes splat. which object experiences the greater force?
When a car is traveling at speed of 30 km per hour. a bug hits the windscreen and goes splat the bug's force on the windshield is equal to the windshield's force on the bug.
Why bug's force on the windshield is equal to the windshield's force on the bug?Bug's force on the windshield is equal to the windshield's force on the bug because the system bug-car maintains its overall momentum during the collision, the change in the car's momentum is equal to and opposes the change in the bug's momentum.
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in an experiment, block is given an initial speed toward block , which is initially at rest. the blocks are on a track that has a motion detector set up, as shown above. when the two blocks collide, there is a completely inelastic collision and the blocks move together with speed . the blocks were both placed on a balance, and it is determined that they have the same mass. the experiment is repeated for four different initial speeds, and the data are shown in the chart below. it appears that the resulting data are not accurate. which measurement most likely produced errors in the data seen in the chart below?
The results that we get from the experiment is accurate within the limits of experimental error. Option E
What is true about the experiment?We know that an experiment is the way by which we can be able to establish a cause and effect relationship. In this case, we can see that there is an inelastic collision that has occurred between the two blocks that have collided in the instance that we can see here.
Looking at the set up of the experiment, it is clear that the block is given an initial speed toward block , which is initially at rest. the blocks are on a track that has a motion detector set up, as shown above.
All of the set up is okay based on the way that such an experiment ought to be arranged to enable us to get a very accurate result out of the work that has been done here.
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A car travels down a road at a certain velocity, vcar. The driver slows down so that the car is traveling only a third as fast as before. Which of the following is the correct expression for the resulting velocity?
a. 2vcar
b. 1/3vcar
c. -1/2vcar
d. -2vcar
The correct expression for the resulting velocity is -1/2 vcar. The correct option is c.
What is velocity?
The directional speed of an item in motion, as measured by a specific unit of time and observed from a certain point of reference, is what is referred to as velocity.
A car travels down a road at a certain velocity, is Vcar.
Let the initial velocity of the car travel downward be -V car
It is also, given, that the driver slows down so that the car is traveling only half as fast as before.
Resulting velocity = -1/2 vcar
Therefore, the correct option is c. -1/2vcar.
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how many molecules of water are in a collection of snowflakes with a mass of 5.00 mg?
A normal snowflake may contain 1,000,000,000,000,000,000, or one quintillion, water molecules.
How many molecules of water are in a snowflake?The variety of sizes and shapes of snowflakes is endless. A lot of them seem to be two-dimensional works of art. Others resemble a tangled collection of ice strands that are beginning to fall apart. While some may fall as multi-flake clusters, most arrive as single particles. The source of all of them is the same: clouds, which typically float at a height of at least one kilometer (0.6 miles).The air up there can get very chilly throughout the winter and will become more colder as you ascend. Those clouds must be below freezing for snowflakes to form. albeit not freezing. A cloud's moisture causes snowflakes to develop. A cloud cannot store enough water for anything to precipitate out if the air temperature is sufficiently low. A balance is therefore required. For this reason, the majority of flakes form at or just below freezing, or 0o Celsius (32o Fahrenheit). Cooler climates can produce snow, but the less moisture there is to form snowflakes the colder it gets.In reality, for a flake to develop, the air inside a cloud must be super-moisture-dense. Because of this, there is more water in the air than is ordinarily feasible. When a substance is supersaturated, the relative humidity might exceed 101 percent. This indicates that 1% more water than the air should be able to carry is present.A cloud will attempt to expel extra water vapor from the air if there is an excessive amount present. Some of that surplus has the potential to crystallize and flash freeze, after which it will slowly drift to the earth.To Learn more About snowflake refer to:
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A 5.3 kg bowling ball begins rolling down a lane at the bowling alley at 6.6 m/s. When it strikes the pins, it is estimated to be moving at 4.0 m/s. What is the magnitude of energy that is lost due to friction?
The magnitude of energy that is lost due to friction is 73.7Joules.
What is energy ?In order to accomplish work and to produce heat and light, energy must be transferred to a body or to a physical system. Energy is the quantitative attribute that does this. Energy is a preserved resource; according to the rule of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.
Computers, vehicles, communications, state-of-the-art medical technology, and many other things are all powered by energy. The demand for dependable and economical energy is especially pressing for emerging countries. It can be beneficial and even life-saving.
Energy required by the body is the kinetic energy
Kinetic Energy = 1 / 2 mv²
m = mass
v = velocity
For the 5.3kg moving at 6.6m/s
kE = 1/2 * 5.3 * 6.6²
KE = 1/2 * 5.3 * 43.56
KE = 115.71Joules
for the 5.3kg moving at 4m/s
KE = 42 joules
Amount of energy lost
= 115.71Joules - 42 joules
= 73.7 joule
Thus, the amount of Energy lost is73.7Joules.
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a child forces a styrofoam ball under the surface of a container of water. if the child must apply 581 n to totally submerge the ball, what is the diameter d of the ball?
The diameter of the ball is 0.4998 m.
Given,
F=581n
Density of water pw= 1.0 x 10³ kg/m³
Density of styrofoam pfoam=95.0 kg/m³
Fb=Buoyancy force
W= Weight of ball
from the Figure
f+w=Fb
Fb-W=f
4/3πR³pwg-4/3πRpfoamg=f
4/3πR³(1000-95) x 9.81=581
R=0.2499m
then the diameter of the ball
d=2R
d=2 x 0.2499
d=0.4998m
the diameter d of the ball = 0.4998m
In physics, force is that power that can change the motion of an item. Pressure also can be described intuitively as a push or a pull.
Force is a push or a pull and it affects our daily lives because, without force, people might not be capable of opening and near stuff or lifting up their arms or legs.
Variety of Forces :
* Frictional Forces
* Tension force.
* Spring force.
* Gravitational pressure.
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The diameter of the ball is 0.4998 m.
What is diameter?
Any straight line segment that cuts through the centre of a circle and has ends that are on the circle is considered a circle's diameter in geometry. It is also known as the circle's longest chord. The diameter of a sphere can be defined using either of the two methods.
F=581n
Density of water pw= 1.0 x 10³ kg/m³
Density of styrofoam pfoam=95.0 kg/m³
Fb=Buoyancy force
W= Weight of ball
from the Figure
f+w=Fb
Fb-W=f
4/3πR³pwg-4/3π Rpfoamg =f
4/3πR³(1000-95) x 9.81=581
R=0.2499m
then the diameter of the ball
d=2R
d=2 x 0.2499
d=0.4998m
the diameter d of the ball = 0.4998m
In physics, force is that power that can change the motion of an item. Pressure also can be described intuitively as a push or a pull.
Force is a push or a pull and it affects our daily lives because, without force, people might not be capable of opening and near stuff or lifting up their arms or legs.
Variety of Forces :
* Frictional Forces
* Tension force.
* Spring force.
* Gravitational pressure.
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