Answer Happy

please do all 3 parts
also no scientifc notation format for the answer please it wont accept that
Question 16 (5 points) Earthquakes are known to generate two types of waves, P-wayes and S waves. Typically, a P-wave travels at 6.00 km/s and an S-wave at 4.00 km/s. If the center of an earthquake occurs at 10800 km away from a seismic station, how much earlier (in sec) does the P-wave arrive at the seismic station than the S-wave? Your Answer: Answer Question 17 (3 points) A car moving at 20.0 m/s (about 45 mph) on a mountain road. The driver of the car beeps his horn emitting a monotonic sound of frequency of 512 Hz. A second car immediately behind the first car in the same lane moves at 18.0 m/s. What frequency does the driver in the second car hears? Let Vair = 343 m/s. Your Answer: units Answer units

Question 21 (5 points) A 0.717-g guitar string is 0.629 m long. The string is under a tension of 73.9-N. What is the wavelength of the 6th harmonics in m? Your Answer: Answer units