Asound wave has a frequency of 247 hz and a wavelength of 1.4 m. what is the speed of the sound wave in air?

Who was the first scientist to measure speed as distance over time?

In what direction does an applied force move an object

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)