Which of the following is one way of stating the principle of relativity?
A) The speed of light is relative to the motion of the observer, provided that the observer is not accelerated.
B) Experiments conducted entirely within your own lab will come out differently, depending on the state of motion of the lab relative to other reference frames.
C) Observers that are accelerated will see light beams move at something other than lightspeed.
D) Light has the same speed for all nonaccelerated observers, regardless of the motion of the source or observer.
E) No physical experiment, conducted entirely within your own lab, can tell you how fast you are moving relative to anything outside the lab.
Question 2
A prankster drops a water balloon from the top of a building. If the balloon is traveling at 29.1 m/s when it strikes a window ledge that is 1.5 m above the ground, how tall is the building? Neglect air resistance.
A) 45 m
B) 43 m
C) 46 m
D) 47 m
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