Nuclear fusion, the energy source of the sun, hydrogen bombs, and fusion reactors, occurs much more readily when the average kinetic energy of the atoms is high-that is, at high temperatures. suppose you want the atoms in your fusion experiment to have average kinetic energies of 6.40×10–14 j. what temperature is needed?

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Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

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