Consider twins, alice and bob. alice goes off in a straight line traveling at a speed of 0.96c for 7 years as measured on her clock, then reverses and returns at half the speed. bob remains at home. make a spacetime diagram showing the motion of alice and bob from bob’s point of view. when alice arrives home, what is the difference in ages between alice and bob?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s