Precipitation is produced by
A) a rising air mass.
B) a descending air mass.
C) condensation of water vapor in the air to make clouds and cloud droplets that fall as liquid water or ice.
D) all of the above
Answer: C
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Pluto is no longer considered a planet
Indicate whether the statement is true or false
A heat exchanger is to be designed to heat a flow of molten bismuth from 377°C to 477°C. The heat exchanger consists of a 50-mm-ID tube with surface temperature maintained uniformly at 500°C by an electrical heater. Find the length of the tube and the power required to heat 4 kg/s and 8 kg/s of bismuth.
GIVENS
FIND
The length (L) tube and power required (q) to heat 4 kg/s and 8 kg/s of bismuth
ASSUMPTIONS
Steady state
Uniform and constant surface temperature
Losses from the heater are negligible
SKETCH
PROPERTIES AND CONSTANTS
for Bismuth at the average bulk temperature of 427°C
When writing for the web, use promotional language, industry jargon, and slang.
Answer the following statement true (T) or false (F)
Overall, Jupiter's composition is most like that of
A) Earth. B) a comet. C) an asteroid. D) the Sun.