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1. You and a friend are riding the subway, and sit at opposite endsof the car. You both count down from five, and then clapsimultaneously, just as the train passes through a station. (It'san express train, so you don't slow down and stop at thestation.)

   According to the predictions of special relativity, what wouldan observer on the subway platform observe as you passed throughthe station?

   		Your claps would not be simultaneous. One would occur before theother.
   		Your claps would occur at the same time.
   		Your claps would occur at the same time, but time would speed upfor you, so they would occur more quickly.

2. Which of the following statements are true regarding lightclocks and time dilation? (Select all that apply.)

   		If two observers are in relative motion, they will disagreeabout whose light clock is running more slowly.
   		Two light clocks are synchronized. They will remain synchronizedeven if one moves, because motion is relative.
   		A moving light clock ticks more quickly than a stationaryone.
   		Because light clocks are just a way to measure time, and anyclock could be synchronized with a light clock, the light clockthought experiment actually tells us that time itself slows downfor moving objects.
   		A moving light clock ticks more slowly than a stationaryone.

3. If I am stationary, and I see you move (from my point of view)at a speed of 25% of the speed of light, which of the followingstatements is true regarding how I will observe time passing foryou?

   		I will observe time moving more slowly for you than for me.
   		I will observe time moving more quickly for you than for me.
   		Time will pass more slowly for you and for me, but I will notnotice it because I am stationary.
   		I will measure no difference between the rate at which timepasses for you and the rate that it passes for me.