Explain how Einstein developed his idea that a clock on a moving spaceship will slow when viewed by an outside observer. Include (define, explain and relate to
your discussion) the following terms: two Postulate of special relativity, light clock,
time dilation and frames of reference. Include diagrams.

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign