If glass expanded more than mercury in a thermometer, then with rising temperature the column of mercury would
A) rise.
B) not change.
C) fall.
Answer: C
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Why is it NOT possible to use visible light to investigate the center of our Galaxy?
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When a 4-?F capacitor has a potential drop of 20 V across its plates, how much electric potential energy is stored in this capacitor?
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Coulomb's Law: Two tiny particles carrying like charges of the same magnitude are 1.0 mm apart. If the electric force on one of them is 5.0 N, what is the magnitude of the charge on each of these particles?(k = 1/4??0 = 9.0 × 109 N ? m2/C2)
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