A weightlifter lifts a 1250 n barbell 2 m in 3 s. How much power was used to lift the barbell

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Oxygen and hydrogen gas are at the same temperature t. what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.