determine the time it takes for a satellite to orbit the earth in a circular "near-earth" orbit. a "near-earth" orbit is one at a height above the surface of the earth which is very small compared to the radius of the earth.

What does the first stage of a multistage rocket do?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.

Which of the following sentences uses an incorrect verb? a. there is only one good candidate. b. many good candidates are possible. c. a good candidate is hard to find. d. there is many possible candidates.