Which of the following energy forms is associated with an object in motion?
a. potential energy
b. elastic potential energy
c. nonmechanical energy
d. kinetic energy
Ans: d. kinetic energy
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The location in the Hertzsprung-Russell (H-R) diagram of giant stars fusing helium is referred to as the vertical branch
Indicate whether the statement is true or false
A thermometer indicates 98.6? C. It may be:
A. outdoors on a cold day B. in a comfortable room C. in a cup of hot tea D. in a normal person's mouth E. in liquid air
A heat pump has a coefficient of performance of 4 . If the heat pump absorbs 20 cal of heat from the cold outdoors in each cycle, the heat expelled (in cal) to the warm indoors is
a. 34 b. 25 c. 36 d. 40 e. 80
If an electron is placed at rest near a bar magnet, the electron will
A. accelerate away from the negative pole of the magnet. B. move in a circular path around the north pole of the magnet. C. not move at all. D. be attracted to the positive pole of the magnet.