A40 kg skier starts at the top of a 12-meter high slope at the bottom she is traveling 10 m/s how much energy does she lose friction?
a. she doesn't lose any because mechanical energy is always conserved
b. 4,704 j
c. 2,000 j
d. 2,704 j

Dry ice is solid carbon dioxide that is used in the transport of food and medicine. dry ice becomes a gas at –78.5°c without becoming a liquid first.

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.

The earth is constantly spinning on its axis, like you might spin a basketball on your finger. it is this spinning of the earth that causes