A distance of 26 mm separates two objects of equal mass. If the gravitational force between them is 0.020 N, find the mass of each object.

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

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

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.)