Jamal is playing in the arcade at Six Flags. At one booth, he throws a 0.5 kg ball with a velocity of 21 m/s andhits a 0.2 kg bottle sitting on a shelf. The bottle goes flying forward at 30 m/s. a). What is the velocity of the ball after it hits the bottle? b). If the bottle was more massive but flew forward with the same final velocity, how would this affect the final velocity of the ball?

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

When an object is heated it contracts. a. true b. false

How are the crust and the inner core alike? a) they are both solid. b) they both have the same temperature. c) they are both under the same pressure. d) they are both very close to the center of the earth.