Erica (39 kg ) and Danny (48 kg ) are bouncing on a trampoline. Just as Erica reaches the highest point of her bounce, Danny is moving upward past her at 4.3 m/s. At that instant he grabs hold of her. Required:
What is their speed just after he grabs her?

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

Which system of units is used by only a small number of countries in the world, including the u.s.

Ascience teacher heated liquid ethanol for an experiment. when he turned up the temperature, the ethanol quickly disappeared, and a strong aroma filled the room. what happened to the ethanol?