How will a lens with a long focal length bend light?
a. a lot
b. a little
c. not at all
d. it depends of the height of the lens.

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

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

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c