Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and the S-waves (S for secondary or shear). In the earth's crust, the P-waves travel at around 6.5 km/s while the S-waves move at about 3.5 km/s. The actual speeds vary depending on the type of material they are going through. The time delay between the arrival of these two waves at a seismic recording station tells geologists how far away the earthquake occurred. If the time delay is 33 s, how far from the seismic station did the earthquake occur?

A person observes a wave (swell) originating at a certain distance from the beach where it is located. Not the time to, because the waves had period T = 8s and %3D that, not the time t1 = to + 2.4×10°s, now has a period of T = 6s. Ask: (1) The distance between the beach and the point where the swell was started.

An earthquake emits primary waves moving at 8.0 km/s and secondary waves moving at 5.0 km/s. How far from the epicentre of the earthquake is the seismic station if the two waves arrive at the station 2.0 min apart?

An earthquake sends a pressure wave passing through the earth. What is the ratio of the intensity measured at 20.0 km and 60.0 km from the source?

As you zip through space in your PPS (personal propulsion suit), your pulse rate as you count it is 117 bpm (beats per minute). This high pulse rate serves as objective evidence of your excitement. However, an observer on the Moon, an expert in pulse rate telemetry, measures your pulse rate as slower. In fact, she detects only 0.525 times the rate you count and claims that you must be pretty calm in spite of everything that is going on. How fast are you moving with respect to the Moon? m/s speed relative to the Moon:

As you zip through space in your PPS (personal propulsion suit), your pulse rate as you count it is 111 bpm (beats per minute). This high pulse rate serves as objective evidence of your excitement. However, an observer on the Moon, an expert in pulse rate telemetry, measures your pulse rate as slower. In fact, she detects only 0.515 times the rate you count and claims that you must be pretty calm in spite of everything that is going on. How fast are you moving with respect to the Moon? speed relative to the Moon: m/s

A boat produces water waves as it sails along a river. You notice that 13 waves hit the bank in 5.4 seconds. If distance between successive wave crests is 3.9 centimeters, how far would these waves travel in 31 seconds. Express your answer in centimeters to at least 3 significant figures.

When a earthquake occurs, transverse and longitudinal waves are produced. These waves do not have the same speed, so one way to detect the hypocenter of the earthquake is to know the time difference between the waves. If the transversal ones travel at 14.5 km/s and the longitudinal ones at 7.8 km/s, at what depth did the earthquake occur if they reach the epicenter 14 seconds apart?

What is the wavelength of an earthquake that shakes you with a frequency of 10 Hz and gets to another city 84000 m away in 12 s? (a) 8400 m (b) 700 m (c) 100.8 m (d) 0.7 m