Which of the following is true?
a. the earth exerts a gravitational force on the moon, but the moon does not exert a gravitational force on the earth.
b. the earth and moon both exert a gravitational force on each other.
c. the moon exerts a gravitational force on the earth, but the earth does not exert a gravitational force on the moon.
d. the earth and moon do not exert gravitational forces.

Ben (55kg) is standing on very slippery ice when junior (25kg) bumps into him. junior was moving at a speed of 8 m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision. give the answer in m/s. describe the work you did to get the answer.

Listed following are various physical situations that describe how light interacts with matter. match these to the appropriate category. 1) transmission? -visible light meets clear glass -visible light does not pass through a black wall -red light hits a red sweatshirt -light comes from your computer screen -cell phone signals pass through walls -blue light hits a red sweatshirt -white light hits a white piece of paper -light comes from a light bulb

Kinetic energy depends a. mass b. speed (velocity) c. both of the above d. none of the above