A weightlifter lifts a 250-kg mass 0.5 meters above his head, how much PEg does the mass have (Note: g=9.8 m/s2)?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere