The value 1.38 × 10^-23 J/K is known as:
a. the universal gas constant.
c. Avogadro's number.
b. Boltzmann's constant.
d. the molar specific.
B
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During a rapid cool, liquid SiO2 solidifies into ______________because of its complex structure.
Fill in the blank(s) with the appropriate word(s).
What is the Moon's gravity? a. There is no gravity on the Moon
b. 1/3 of Earth's gravity c. 1/2 of Earth's gravity d. 1/6 of Earth's gravity e. The Moon's gravity is the same as that of Earth.
In the greenhouse effect, what is the direct cause of extra heating of the Earth's surface?
A) Additional carbon dioxide makes the atmosphere more opaque to infrared light, trapping part of the blackbody radiation that would normally escape into space. B) Additional carbon dioxide makes the atmosphere more transparent to infrared light, allowing the sun to more directly heat the surface. C) Additional carbon dioxide makes the atmosphere denser, and thus heat passes through it more slowly.
How does the heat energy from the Sun reach us through the vacuum of space?
a. conduction c. convection b. radiation d. none of the above choices are valid