The epicenter of an earthquake is located 6,500 kilometers away from a seismic station. If the first S -wave arrived at this seismic station at 1:30 p. m., at what time did the first P-wave arrive?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?