A ball is thrown from the top of a building with an initial velocity of 20.0 m / s straight upward, at an initial height of 50.0 m above the ground.

What if? if the temperature near the cliff suddenly falls to 0°c, reducing the speed of sound to 331 m/s, what would the initial speed of the rock have to be (in m/s) for the soccer player to hear the sound of the splash 2.90 s after kicking the rock?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

In science and physics what is the standard unit of measure for speed?