A person does 15 J of work moving a couch 1.3 m. How much force was used?​

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?

Explain what happens at the saturation point when adding salt to water at room temperature.

During the past 150 years in the united states, how did energy consumption compare to population growth