Whenever a gas is compressed,
A. heat must leave the gas.
B. the temperature of the gas must get smaller.
C. its internal energy must get smaller.
D. work must be done on the gas.
Answer: D
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In epoxy and polyester thermoset polymers, liquid resin and liquid _________are mixed to form a liquid that transforms to a solid.
Fill in the blank(s) with the appropriate word(s).
When a ray of light passes obliquely from one medium to another, which of the following changes?
A) direction of travel B) speed, direction of travel, but not wavelength C) wavelength D) wavelength, speed, & direction of travel E) speed
Rank the following five capacitors in the order of the magnitudes of the charges on their plates
(a) a 20-µF capacitor with a 4-V potential difference between its plates (b) a 30-µF capacitor with charges of magnitude 90 µC on each plate (c) a capacitor with charges of magnitude 80 µC on its plates, differing by 2 V in potential, (d) a 10-µF capacitor storing energy 125 µJ (e) a capacitor storing energy 250 µJ with a 10-V potential difference
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a. gamma ray c. beta particle b. positron d. alpha particle