A mercury thermometer has a glass bulb of interior volume 0.100 cm3 at 10°C. The glass capillary tube above the bulb has an inner cross-sectional area of 0.012 mm2. The coefficient of volume expansion of mercury is 1.8 × 10-4 K-1
If the expansion of the glass is negligible, how much will the mercury rise in the capillary tube when the temperature rises from 5°C to 35°C if the bulb was full at 5°C? A) 0.45 mm
B) 4.5 mm
C) 45 mm
D) 45 cm
C
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Both black and white road surfaces radiate energy. At midnight on a starry night the warmer road surface is the
A) black surface. B) white surface. C) neither, as no noticeable difference.
The temperature of a gas can be increased by
a. compressing it. b. adding heat to it. c. doing work on it. d. all of the above. e. none of the above.
Both conventional fossil fuel and nuclear power plants
A. contribute to the problem of acid rain. B. produce waste heat that can affect the weather or upset the ecology of rivers or lakes. C. produce carbon dioxide, which may increase global warming. D. produce hazardous waste products that must be stored in isolation for thousands of years.
Two stars of masses M and 6M are separated by a distance D. Determine the distance (measured from M) to a point at which the net gravitational force on a third mass would be zero
a. 0.41 D b. 0.33 D c. 0.37 D d. 0.29 D e. 0.14 D