Which of the following is the expression of mean square speed of 'N' gas molecules contained in a cylinder?
Correct answer: B. Option B
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Mean square speed is the average of the squares of the molecular speeds, <v^2> = (v1^2 + v2^2 + ... + vN^2)/N, which is the quantity appearing in PV = (1/3)Nm<v^2>. The choices in this paper were printed as diagrams rather than text, so learn the expression itself rather than the option label.
This question appeared on the UHS MDCAT 2012 paper, which you can sit online with every answer explained.
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