Relativistic time: A correctly functioning hourglass on board a rocket ship would appear to astationary observer to take longer than an hour to empty. The graph in Figure 1.51 shows the time T , in...

Relativistic time: A correctly functioning hourglass on board a rocket ship would appear to astationary observer to take longer than an hour to empty. The graph in Figure 1.51 shows the time T , in hours, that it appears to a stationary observer to take an hourglass to empty if it is on a rocket ship moving at a given percentage r, as a decimal, of the speed of light.

 a. Use the graph to estimate the value of T (0.6) and explain in practical terms what it means.

b. Is the graph concave up or concave down?

c. Does a small change in velocity cause a greater change in apparent time at slower speeds or at faster speeds?