A high school student hits a nail with a hammer. During the collision there is a force *

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.

7types of electromagnetic waves from lowest to highest frequency

Do you think you could give me the answers to #29?