Outgassing is
a. the adding of material to an object an atom or molecule at a time.
b. the adding of material to an object by collection of solid particles.
c. the release of gas from rocks as they are heated.
d. the largest of the Galilean satellites.
e. caused by the bombardment of the solar wind.
c
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An 800-MW electric power plant has an efficiency of 30%. It loses its waste heat in large cooling towers. Approximately how much waste heat (in MJ) is discharged to the atmosphere per second?
A. 1 200 B. 1 900 C. 800 D. 560 E. 240
Long ago a runaway greenhouse effect greatly transformed the planet
A) Mercury. B) Venus. C) Mars. D) none of the above
The diameter of a 12-gauge copper wire is 0.081 in. The maximum safe current it can carry (in order to prevent fire danger in building construction) is 20 A
At this current, what is the drift velocity of the electrons? The number of electron carriers in 1.0 cm3 of copper is 8.5 × 1022 and e = 1.60 × 10-19 C. A) 0.044 mm/s B) 0.44 mm/s C) 0.44 cm/s D) 0.44 m/s E) 4.4 cm/s
A potential difference of 1.00 V is maintained across a 10.0-V resistor for a period of 20.0 s. What total charge passes by a point in one of the wires connected to the resistor in this time interval?
1.200 C 2.20.0 C 3.2.00 C 4.0.005 00 C 5.0.050 0 C