97.38: A vehicle traveli md2cf43 ejwj dic 1l4yy.jss( (k:sh,ng at a constant 0.60 c passes a clock at a street intersection. For a one-second interval on that clock, what interval will the dd.cd je: (wj4yh3sfml 1,(ss2kcy4jiriver of the vehicle measure?

  07.48: How fast must an observer move so t b 8nlsp4pm8lkwx6qx5+h:wc. hat a stationary object appears to be one-half of its plxmcxw 8 8s.pwq+ :lnhk65b4proper length?

  11.50: A person sets a one-meter long stick so that it mak5( b(hlzrnt8ssk; yvxg3 v8dn1, 1szges a $30^{\circ}$ angle with the x-axis. An observer in a space ship moving along the x-axis measures the angle of the stick to be $60^{\circ}$ with the 6-axis. With what speed is the space ship moving in terms of the speed of light c?

  14.50: Two clocks, A and B, are synchronized on1+0mem3orbrzs 6 vhc - Earth. Clock A is placed onto a space ship that leaves Earth in a straig 3v06ohe m+m1 r-sbrczht line with a speed of $2.40\times\: 10^8$ m/s. On Earth, a scientist with clock B has her telescope fixed directly on clock A. If each clock started at t = 0 s, what time does the scientist observe on clock A when clock B reads t = 90 s ? Assume the time of acceleration for the ship leaving the Earth was negligible.

  16.49: John is at rest on a platform that he meas)d/qh hqwwq) 9up: xx+ 2nht4nures to be 500 m long on the x-axis. Hdxq4)9whxqnwp+2uh q)n/ : hte then sees a spaceship moving along the x-axis with a speed of $1.80\times\: 10^8\:m/s$ as it crosses the length of the platform. Sitting in her chair, the spaceship's pilot measures the time it takes her to cross the platform. What type of time interval does she measure and what value does she obtain?