Which food item is used in the production of dynamite?

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic