The temperature of a quantity of ideal gas in a sealed container is increased from 0°C to 273°C. What happens to the rms speed of the molecules of the gas as a result of this temperature increase?
a. It does not change since rms speed is independent of temperature.
b. It increases but it less than doubles.
c. It doubles.
d. It quadruples.
b
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Density: A porch roof that slopes upward at 45° measures 3.0 m × 5.0 m. It is covered with a slab of insulating material that is 2.0 cm thick. If the density of the insulation is 15 kg/m3, what is the weight of the insulation, in pounds, on the roof? (1.00 kg weighs 2.2 lb and density is mass per unit volume.)
A. 4.5 lb B. 9.0 lb C. 20 lb D. 990 lb E. 9.9 lb
Which of the following statements comparing open and globular star clusters is not true?
A) Stars in open clusters are relatively young while stars in globular clusters are very old. B) Open and globular clusters each typically contain a few hundred stars. C) For both open and globular clusters, we can assume that all the stars in a particular cluster are about the same age. D) Open clusters are found only in the disk of the galaxy while globular clusters may be found both in the disk and the halo of the galaxy.
The helium capture process tends to produce chiefly
A) only carbon. B) stable elements. C) even numbered elements. D) odd numbered elements. E) only radioactive elements.
The buoyant force that keeps a ship afloat is an example of __________ principle
Fill in the blank(s) with correct word