a person tries to move a heavy stone of mass 100 kg for an hour but fails (a).How much work has to be done on the stone?(b).if instead ,he ,lifts lifts it up to a height of 2m , how much work is done

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

Why do astronauts in the space shuttle weigh less?