s2 review clickers

Chapter S2 Review Clickers

The Cosmic PerspectiveSeventh Edition

Space and Time

Chapter S2

Einstein said that everything is relative.

a) trueb) false

Chapter S2

Einstein said that everything is relative.

a) trueb) false

Chapter S2

Einstein said that motion is relative; i.e., there isn't one preferred frame of reference from which to view it.

a) trueb) false

Chapter S2

Einstein said that motion is relative; i.e., there isn't one preferred frame of reference from which to view it.

a) trueb) false

Chapter S2

What are the key facts on which special relativity is based?

a) The speed of light is the same for all observers.b) The laws of nature look the same to all observers.c) There is no preferred "up" or "down" in space.d) all of the abovee) A and B

Chapter S2

What are the key facts on which special relativity is based?

a) The speed of light is the same for all observers.b) The laws of nature look the same to all observers.c) There is no preferred "up" or "down" in space.d) all of the abovee) A and B

Chapter S2

Suppose you are traveling at 500 km/hr towards someone floating out in space, and only saw them – no other reference. You would say

a) that you are moving 500 km/hr towards them.b) they are moving 500 km/hr towards you.c) that they aren't moving relative to you.d) none of the above

Chapter S2

Suppose you are traveling at 500 km/hr towards someone floating out in space, and only saw them – no other reference. You would say

a) that you are moving 500 km/hr towards them.b) they are moving 500 km/hr towards you.c) that they aren't moving relative to you.d) none of the above

Chapter S2

Suppose you are traveling in a plane at 900 km/hr. You throw a baseball. Compared to the ground, your throw will take

a) the same amount of effort.b) a lot more effort.c) a little more effort.d) different amounts of effort, depending on which

direction you throw it.

Chapter S2

Suppose you are traveling in a plane at 900 km/hr. You throw a baseball. Compared to the ground, your throw will take

a) the same amount of effort.b) a lot more effort.c) a little more effort.d) different amounts of effort, depending on which

direction you throw it.

Chapter S2

Suppose you are in a plane flying completely smoothly at 900 km/s. Without making reference to outside the plane, could you tell what your motion was?

a) yesb) no

Chapter S2

Suppose you are in a plane flying completely smoothly at 900 km/s. Without making reference to outside the plane, could you tell what your motion was?

a) yesb) no

Chapter S2

Suppose you are traveling at 500 km/hr. You shine a flashlight in the direction you are going. Someone in a different frame of reference will see the light pass them

a) at a speed 500 km/hr faster than someone who is moving with you.

b) at a speed 500 km/hr slower than someone who is moving with you.

c) at the same speed as you see the light move.

Chapter S2

Suppose you are traveling at 500 km/hr. You shine a flashlight in the direction you are going. Someone in a different frame of reference will see the light pass them

a) at a speed 500 km/hr faster than someone who is moving with you.

b) at a speed 500 km/hr slower than someone who is moving with you.

c) at the same speed as you see the light move.

Chapter S2

Why do we think the speed of light is the same for all observers?

a) This assumption makes the laws of physics simpler.b) Einstein thought of this, and everything he thought

has proven to be correct.c) Experiments have showed this to be true.d) none of the above

Chapter S2

Why do we think the speed of light is the same for all observers?

a) This assumption makes the laws of physics simpler.b) Einstein thought of this, and everything he thought

has proven to be correct.c) Experiments have showed this to be true.d) none of the above

Chapter S2

The famous Michelson-Morley experiment showed that light traveling in the same direction as Earth orbits the Sun

a) travels faster than light going the opposite way.b) travels slower than light going the opposite way.c) travels at the same speed as light going the

opposite way.

Chapter S2

The famous Michelson-Morley experiment showed that light traveling in the same direction as Earth orbits the Sun

a) travels faster than light going the opposite way.b) travels slower than light going the opposite way.c) travels at the same speed as light going the

opposite way.

Chapter S2

If you see something pass you at 90% the speed of light, as it passes by

a) it will look redder (redshifted).b) it will look bluer (blueshifted). c) it will look contracted (shortened) along the

direction of motion.d) it will look the same as if it were not moving

Chapter S2

If you see something pass you at 90% the speed of light, as it passes by

a) it will look redder (redshifted).b) it will look bluer (blueshifted). c) it will look contracted (shortened) along the

direction of motion.d) it will look the same as if it were not moving

Chapter S2

If someone were to pass you at 90% the speed of light,

a) time would appear to be running slower for them, and they would think that time is running slower for you.

b) time would appear to be running slower for them, but they will think time is running faster for you.

c) time would appear to be running slower for them, but they will see your time unchanged.

d) none of the above

Chapter S2

a) time would appear to be running slower for them, and they would think that time is running slower for you.

b) time would appear to be running slower for them, but they will think time is running faster for you.

c) time would appear to be running slower for them, but they will see your time unchanged.

d) none of the above

Chapter S2

Time dilation – the slowing down of time for objects moving at nearly the speed of light

a) has not yet been tested.b) does not really happen.c) has been observed for subatomic particles that

decay after a certain time.d) has been proven true beyond all doubt.

Chapter S2

Time dilation – the slowing down of time for objects moving at nearly the speed of light

a) has not yet been tested.b) does not really happen.c) has been observed for subatomic particles that

decay after a certain time.d) has been proven true beyond all doubt.

Chapter S2

a) their mass would appear larger than if they were standing still.

b) their mass would appear the same as if they were standing still.

c) their mass would appear smaller than if they were standing still.

Chapter S2

a) their mass would appear larger than if they were standing still.

b) their mass would appear the same as if they were standing still.

c) their mass would appear smaller than if they were standing still.

Chapter S2

Since mass increases more and more as you approach the speed of light,

a) reaching the speed of light takes a huge amount of energy.

b) nothing can ever reach the speed of light.c) only very small objects can reach the speed of light.

Chapter S2

Since mass increases more and more as you approach the speed of light,

a) reaching the speed of light takes a huge amount of energy.

b) nothing can ever reach the speed of light.c) only very small objects can reach the speed of light.

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