What is the change in potential energy of an energetic 65 kg hiker who makes it from the floor of death valley to the top of mt. whitney?

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.

Mark creates a graphic organizer to review his notes aboutelectrical force. which labels belong in the regions marked x and y?

Is the number of complete movements of a wave per second.