An object is dropped from rest.
Calculate its velocity after 2.5 seconds

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

If a balloon is taken outside on a very cold day, what will occur?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack