Calculate the gravitational potential energy with respect to Earth's surface gained by a 5.00-kilogram mass as a result of being raised 2.00 meters from Earth's surface.​

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

The material that keeps its new shape after it is stretched is called?