Aboat moves with a speed of +2.5 m/s in a direction 25° north of east. if the mass of the boat is 15,000 kg, what is the momentum in the northward direction? a. +15,848 kg-m/s b. +33,987 kg-m/s c. +37,500 kg-m/s d. +339,865 kg-m/s

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

Oxygen and hydrogen gas are at the same temperature t.what is the ratio of kinetic energies of oxygen molecule and hydrogen molecule if oxygen is 16 times heavier than hydrogen.

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack