Is a measure of how rapidly or slowly molecules move?

Find the volume of the ellipsoid x^2+y^2+5z^2=36.

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.)

What are the necessary conditions for fusion?