97.38: A vehicle traveling at a constant 0.60 c pazy q8 */k3yocbsses a clock at a street intersection. For a one-3y*b/yqck 8zo second interval on that clock, what interval will the driver of the vehicle measure?

  07.48: How fast must an observer move so that a sso*r ::;kh lx wfo.f7etationary object appears to be one-half of its pro hsw*f; fo.erx:o7k:lper length?

  11.50: A person sets a one-meter long stick so that ito,2zimb8 3ytd 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,p)l8-u b zgl/a are synchronized on Earth. Clock A is placed onto a space ship tha)blu- pl8/z gat leaves Earth in a straight 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 platfog*efqkmh/fi+ +no vx2ic2j* wu 093+jswq qv.rm that he measures to be 500 m long on the x-axis. He tf ki+*/ xuj+i0sm hwqqe3*c 2 9.2onjvgvf +qwhen 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?