Defects in crystals increase the energy _________of the x-ray diffraction lines relative to a perfect crystal.
Fill in the blank(s) with the appropriate word(s).
width
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A heater draws 20A when connected to a 110-V line. If the electric power costs 20 cents per kilowatt hour, the cost of running the heater for 10 hours is
A) $0.44. B) $1.10. C) $4.40. D) $11.00. E) none of the above
A tuning fork is sounded above a resonating tube (one end closed), which resonates at a length of 0.40 m and again at 1.2 m. If the tube length were extended further, at what point will the tuning fork again create a resonance condition?
a. 1.6 m b. 2.0 m c. 2.4 m d. 3.2 m e. 6.4 m
The quantity of electrical potential, the volt, is dimensionally equivalent to:
a. force/charge. b. force × charge. c. electric field × distance. d. electric field/distance.
You are in a place that is extremely hot and dense, making you feel quite sweaty and claustrophobic. You can't see far because your surroundings are opaque to light. Around you, nuclear fusion is converting carbon into oxygen and other elements
Where are you? A) You are in the center of a star very much like our Sun. B) You are in the early universe during the era of nucleosynthesis. C) You are inside a nuclear power plant on Earth. D) You are in the center of a massive star near the end of its life. E) You are in the center of a star much smaller than the Sun.