Two bricks of the same mass are each on ledges. Brick 1 is 100 feet high and brick 2 is 300 feet high. Brick 2 has: Two times more potential energy
Three times more potential energy
Four times more potential energy
Zero times more potential energy
Nine times more potential energy

An asteroid is discovered in a nearly circular orbit around the sun, with an orbital radius that is 2.47 times earth's. what is the asteroid's orbital period, its "year," in terms of earth years?

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

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.