A gas is placed in a container, which is immersed in an ice-water mixture as shown below
As the piston is slowly lowered, the temperature...
1.... increases.
2.... decreases.
3.... stays the same.
4.The change in the temperature cannot be determined.
3
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A _________ is an electrochemical cell that consumes a fuel and directly produces electrical energy.
Fill in the blank(s) with the appropriate word(s).
6The sideral period of the moon
a. is about 27.32 days long. b. is the period of time for the moon to orbit Earth once with respect to the stars. c. is the period of time between successive eclipses at a given location on Earth. d. is the period of time from when the moon rises until the moon rises again the next night. e. a and b above
From the mass-luminosity relation, a 2-solar-mass star on the main sequence would have a luminosity of approximately ____ solar luminosities
a. 2 b. 4 c. 11 d. 0.5 e. 0.25
The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules, with a molecular weight of 44 g/mol, is 396 m/s
What is the root-mean-square speed (thermal speed) of water vapor molecules, with a molecular weight of 18 g/mol, at the same temperature? A) 253 m/s B) 396 m/s C) 421 m/s D) 506 m/s E) 619 m/s