Work: If the force on an object is in the negative direction, the work it does on the object must be

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.

What is the temperature in degrees celsius of a substance with a tempature of 49k

Sound is a disturbance that travels through a medium as a