According to the second law of thermodynamics,
A) the total entropy of all the participants in any physical process cannot decrease.
B) thermal energy flows spontaneously from hot objects to cold objects.
C) energy process that uses thermal energy to do work must have a thermal energy exhaust.
D) All of the above.
E) None of the above.
D
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Pluto is different from the Jovian planets in all of the following ways except which one?
A) Its orbit is not very close to being circular. B) It formed outside of the frost line in the solar nebula. C) It has a solid surface. D) It is made mostly of ices. E) It doesn't have rings.
Four point charges are on the rim of a circle of radius 10 cm. The charges are (in ?C) +0.50, +1.5, ?1.0, ?0.50 . If the electrical potential at the circle's center due to the +0.5 charge alone is 4.5 × 10^4 V, what is the total potential at the center due to the four charges combined?
a. 18 × 10^4 V b. 4.5 × 10^4 V c. zero d. ?4.5 × 10^4 V
The average temperature of the typical dark dust cloud is about
A) 0 K. B) 2.73 K. C) 100 K. D) 3,000 K. E) 6,000 K.
You stand near the earth's equator. A positively charged particle that starts moving parallel to the surface of the earth in a straight line directed east is initially deflected upwards. If you know there are no electric fields in the vicinity, a possible reason why the particle does not initially acquire a downward component of velocity is because near the equator the magnetic field lines of the
earth are directed a. upward. b. downward. c. from south to north. d. from north to south. e. from east to west.