Explain why there are temperature difference on moons surface even though it has atmosphere

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.

If a simple machine reduces the strength of a force, what must be increased?

What causes the development of most clouds and precipitation in the atmosphere?