a ball is thrown straight into the air. The ball's gravitational potential energy at its peak height was 0.4J, and it's speed when it hit the ground was 4m/s. What was the mass of the ball?

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.

1. may 2. september 3. february, and december4. 70°f

It's have to be 12 or idk

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