97.38: A vehicle tra -u s.,rsslj;rveling at a constant 0.60 c passes a clock at a street intersection. For a one-second interval on that clock, what interjs.ls -rs,u;rval will the driver of the vehicle measure?

  07.48: How fast must an obser/k s7ef;.ph gvk)/2j-2djwfp*ndhvxs o9 :m q ver move so that a stationary object appears to be one-hap7d );2sd:kjes.vm q/g2vhw/*phx fnkoj-9f lf of its proper length?

  11.50: A person sets a one-meter long stick2n6a /kewh - e1wr0qdq,3 uvlz so that it makes 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 on Earth. Clock A is plaw3.im3py w q.kced onto a space ship that leaves Earth in a straight lpyq 3kmi3w.w. ine 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 measures to be 500 m long oc8 xkfp-mq)s vgz z3 096h+3bjy)1xvtj 7qa trn the x-axis. He th bgxj-8qthkaz3 0zy1v fx3rs7m)j9+p t6vc )qen 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?