A cyclical process that transfers energy as heat from a high temperature reservoir to a low temperature reservoir with no other change would violate:
A. the zeroth law of thermodynamics
B. the first law of thermodynamics
C. the second law of thermodynamics
D. the third law of thermodynamics
E. none of the above
Ans: E. none of the above
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Indicate whether the statement is true or false
Which of the following is true of the Universe when it was three minutes old?
A) Photons continuously produced neutron-antineutron pairs. B) Protons and neutrons linked to form deuterium. C) Most nuclear reactions had stopped. D) Nuclear reactions had stopped completely.
Vector = 6.0 m and points 30° north of east. Vector = 4.0 m and points 30° south of west. The resultant vector + is given by
A) 2.0 m at an angle 30° north of east. B) 2.0 m at an angle 60° north of east. C) 10.0 m at an angle 60° east of north. D) 10.0 m at an angle 30° north of east. E) 10.0 m at an angle 60° north of east.
What force(s) are responsible for the collapse of an interstellar cloud?
a. nuclear b. gravity c. electric d. magnetic e. both c and d