Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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| 1. | When
we move around through space just a little bit, we are moving _____. a. | through time
only | b. | only through
space | c. | mostly through time and only a little bit through
space | d. | mostly through space and only a little bit through
time | e. | none of the
above | | |
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| 2. | A
spaceship moves away from a space station at one-half the speed of light. If a person in the space
station flashes a light beacon, people in the ship will see light traveling toward them at a speed of
_____. a. |  the speed of light | b. |  the speed of light | c. |  the speed of light | d. |  the speed of light | e. | the speed of
light | | |
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| 3. | According to the special theory of relativity, all laws of nature are the same in
reference frames a. | that move at
constant speeds. | b. | that accelerate. | c. | that
vibrate. | d. | that oscillate. | e. | none of the
above | | |
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| 4. | Compared to time kept on Earth, there is a physical slowing of time when you travel at
_____. a. | everyday low
speeds. | c. | both A and
B | b. | relativistic
speeds. | d. | none of the
above | | | | |
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| 5. | A
friend is riding on the back of a truck that is going away from you at 25 km/hr. After the truck
passes, your friend throws a ball toward you at 55 km/h relative to her. How fast is the ball going
relative to you? a. | 25
km/h | b. | 30
km/h | c. | 55
km/h | d. | 80
km/h | e. | 105
km/h | | |
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Essay
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| | 6. | Using
the formula for time dilation, figure out how long it would take a person traveling at 94% the speed
of light to travel to the star Procyon, 10.4 light years away.
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