Two negative charges that are both -3.0 C push each other apart with a force of 19.2 N. How is the electric force between two charges affected when both of the charges are cut in half?

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.

If a tank filled with water contains a block and the height of the water above point a within the block is 0.8 meter, what is the pressure at point a?

You can melt ice by applying pressure because the solid/liquid line has a slope.