When sand absorbs the electromagnetic waves of the Sun, it becomes warm through the process of. Question 12 options: radiation conduction convection evaporation.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.