Describe two measurements you need to know to determine the magnitude of an earthquake by using a Richter magnitude chart.

This is what i found on google “according to the collision theory, the following criteria must be met in order for a chemical reaction to occur: molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. molecules must collide with the proper orientation.” i hope this information you.

If football was tossed in air without gravity or friction the ball would go into space

The answer is frictional force