Energy conservation tells us that the energy of a system can change via
A. Heat transfer
B. The energy of a system cannot change
C. Work done and/or heat transfer
D. Work done on or by the system
Ans: C. Work done and/or heat transfer
You might also like to view...
What is a meteorite?
A) a streak of light caused by a star moving across the sky B) a streak of light caused by a small particle from space burning up in Earth's atmosphere C) a fragment of rock that has fallen to Earth's surface from space D) a small moon that orbits one of the jovian planets E) a comet that burns up in Earth's atmosphere
When light passes through common windowpane, its angle of emergence is
A) usually less than its angle of incidence. B) always less than its angle of incidence. C) the same as its angle of incidence. D) usually more than its angle of incidence. E) always more than its angle of incidence.
In the process of fluorescence, the input is high-frequency light and the output is
A) higher-frequency light. B) equally high-frequency light. C) lower-frequency light. D) none of the above
When Burl and Paul stand on opposite ends of a sign-painting scaffold, the tensions in the supporting ropes
A) are equal. B) depend on the relative weights of Burl and Paul. C) combine to equal zero. D) are in equilibrium.