The wavelength of a wave is the distance between

A parachutist jumps from a plane. He accidentally drops his cell phone at an altitude of 100 m when he has a velocity of 12 m/s down. What is the velocity of the phone when it hits the ground? Assume there is no air resistance acting on the phone.

Suppose the Moon had twice the diameter but the same mass and same orbital distance from Earth. In that case, the high tides on Earth would be :

Two strings of equal length are stretched out with equal tension. The second string is four times as massive as the first string. If a wave travels down the first string with velocity v, how fast does a wave travel down the second string?

The pump of a water distribution system is powered by a 20-kW electric motor whose efficiency is 90%. The water flow rate through the pump is 40 L/s.

If a car is traveling eastward, can its acceleration be westward? Explain your answer, and use an example in your explanation.

The distance between two consecutive crests is 2.5 meters. Which characteristics of the wave does this distance represent?

Who first landed on the moon?

What factors affect the speed of a wave? Check all that apply. the amplitude of the wave the energy of the wave the temperature of the medium the type of wave the type of medium

A sound level of 96 dB is how many times as intense as one of 90 dB?

Which type of waves are whale songs in an ocean?