The last quarter phase of the Moon:
A) rises at sunrise.
B) sets at sunrise.
C) crosses the meridian at sunrise.
D) rises at sunset.
E) sets at sunset.
C
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A refrigerator uses 100 W of electric power and discards 600 W of thermal power into the kitchen. What is its coefficient of performance?
A. 0.17 B. 0.20 C. 5 D. 6 E. Other (specify) F. Impossible because it violates conservation of energy.
Why do we think Mars had more volcanic activity in the past than it does today?
a. Mars was bombarded with more impacts in the past, which fueled more volcanic activity. b. Mars’ interior would have been warmer in the past. c. Some meteorites from Mars come from relatively young lava. d. All of the above. e. b and c.
The zeroth law of thermodynamics states that
A. energy is conserved B. heat will flow from colder temperature to hotter temperature C. two objects in thermal equilibrium with each other have the same temperature D. the effect of 4.19 Joule of work is the same as that of 1 calorie of heat in increasing the temperature of the system
A single slit forms a diffraction pattern with monochromatic light. The 4th minimum of the pattern occurs at an angle of 35° from the central maximum. How many bright bands are on each side of the central maximum?
A) 5 B) 4 C) 6 D) 7 E) 8