Students test the effects of forces that act from a distance, causing objects to move. they discover that two forces have this effects on objects. these firces are

A100 kg running back runs at 5m/s into a stationary linebacker. it takes 0.5 for the running back to be completely stopped

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Why do atoms emit energy of only specific wavelengths