Determine what forces are present in this situation: an elevator is rising at a constant speed; the elevator is the object in this situation.

Which property of fossils allow scientists to determine the relative rock ages..

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?