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).

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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

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Atmospheric refraction makes the daylight hours

A) longer. B) shorter. C) neither

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