Two ideal gases, X and Y, are thoroughly mixed and at thermal equilibrium in a single container. The molecular mass of X is 4 times that of Y. What is the ratio of root-mean-square velocities of the two gases, vX, rms /vY, rms?
a. 4/1
b. 2/1
c. 1/2
d. 1/4
e. 1/3
c
Physics & Space Science
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The annealing point for the soda-lime glass in Figure 9.3 is approximately _________K
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
An object travels halfway around a circle at a constant instantaneous speed 
.What is the magnitude 
of its average velocity during this time interval?
A. 
B. 1.41
C. 1.57
D./1.41
E. /1.57
Physics & Space Science
Atmospheric refraction makes the daylight hours
A) longer. B) shorter. C) neither
Physics & Space Science
Area on a P-V diagram has units associated with:
a. energy. c. temperature. b. momentum. d. change in temperature.
Physics & Space Science