A tennis player smashes a ball of mass ������ horizontally at a vertical wall. The ball rebounds at the same speed ������ with which it struck the wall.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.

c)as speed changes, wavelength and frequency change.

everything changes!

"i have always loved contemporary art and made it a general goal to work within the field. after a few nonprofit internships at museums and galleries, i decided to try the for-profit art world and was offered a job as the ad assistant at the magazine. i much prefer the pace of the for-profit art community and have stayed with the company for three years, with a promotion to an account manager last spring."

i just did this and got a 100.

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods