Desperate Please Hurry What was the evidence that Earth was round before there were photos from space?

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

In a system, when potential energy decreases, then entropy also decreases. true false

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?