A4 feet tall student went for swimming in a pool he saw the depth of the water in the pool less than 4 feet. Will he drowned? Write with a reason

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in