The rms velocity of a He molecule in helium gas with a temperature of 20
is 1,352 m/s. What is the rms velocity of the molecule if the temperature of the gas is tripled?
A. 2,340 m/s
B. 3,640 m/s
C. 3,980 m/s
D. 4,120 m/s
E. 4,500 m/s
A. 2,340 m/s
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A. 560 ?m B. 9.8 ?m C. 32,000 ?m D. 4700 ?m
The resistance of a 100-cm wire of cross sectional area 2 × 10-6 m2 is 400 ?. What is the resistivity of the material of this wire?
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In which of the following cases does the automobile have an acceleration?
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If a wave from one slit of a Young's double-slit set-up arrives at a point on the screen one-half wavelength behind the wave from the other slit, what is observed at that point?
a. dark fringe c. gray fringe, neither dark nor bright b. bright fringe d. multi-colored fringe