The water level in a water tower is 50.00 m above the ground. What is the gauge pressure of the water at a faucet that is 2.000 m above the ground?
A. 500,200 
B. 470,400
C. 451,300
D. 422,400
E. 410,400
B. 470,400
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A moon is in orbit around its mother planet. Which of the following statements is always true about its kinetic energy (K), and its gravitational potential energy (U)?
A) K is negative, and U is negative. B) K is negative, and U is positive. C) K is positive, and U is negative. D) K is positive, and U is positive.
In an isobaric process
a. the volume remains constant. b. the temperature remains constant. c. the pressure remains constant. d. no heat is transferred between a system and its surroundings. e. the internal energy is constant.
What source of energy might keep water beneath the surface of Enceladus liquid?
A) tidal heating only B) radioactive decay only C) tidal heating and radioactive decay D) heat released from a partially molten core
A cyclist races around a circular track at the constant speed of 20 m/s. The radius of the track is 40 m. The centripetal acceleration of the cyclist is
A. 10 m/s2, downward. B. 10 m/s2, toward the center of the track. C. zero. D. 20 m/s2, in the direction of travel.