The volume of material leaving a waste-burning power plant is smaller than the volume that arrived
What will be an ideal response?
That is the case. Much of the material in the waste stream is carbon-based, and
carbon that is in solids when burned in air makes carbon dioxide, a gas that is removed from
the solid material. The volume of solid material is much less than in the original waste
stream, which is what has made burning of MSW so attractive in Europe and Japan, two
regions lacking large areas that can be committed to landfills.
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Would a nitrogen atom in Venus's atmosphere, whose temperature is 740 K, eventually es-cape into outer space? Note that a nitrogen atom has a mass that is 14 times that of a hydro-gen atom. Recall that atoms eventually will escape if their average velocity is greater than 1/6 times the escape velocity of the planet. The escape velocity of Venus is 10 km/s. For comparison, a hydrogen atom has an average velocity of 2.5 km/s at a temperature of 300 K.
a. The average velocity of nitrogen atoms is 0.4 km/s, and nitrogen does not escape. b. The average velocity of nitrogen atoms is 1.0 km/s, and nitrogen does not escape. c. The average velocity of nitrogen atoms is 1.0 km/s, and nitrogen escapes. d. The average velocity of nitrogen atoms is 4.5 km/s, and nitrogen does not escape. e. The average velocity of nitrogen atoms is 4.5 km/s, and nitrogen escapes.
Suppose it is full moon. What phase of Earth would someone on the Moon see at this time?
A) full Earth B) new Earth C) first-quarter Earth D) Earth does not go through phases as seen from the Moon.
After seeing a flash of lightning, if one counts the seconds before hearing the thunder, one can estimate the distance to the flash. How many seconds delay
(a) per mile? (b) per kilometer?
The process by which raindrops are formed by the collision of droplets is called
a. the Bergeron process. b. fusion. c. fission. d. coalescence.