Question:
Five gas molecules chosen at random are found to have speeds of 500, 600, 700, 800 and 900 m/s.
Five gas molecules chosen at random are found to have speeds of 500, 600, 700, 800 and 900 m/s.
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RMS speed is always greater than average speed.
Updated On: Mar 20, 2026
- The root mean square speed and the average speed are the same.
- The root mean square speed is 14 m/s higher than the average speed.
- The root mean square speed is 14 m/s lower than the average speed.
- The root mean square speed is √(14) m/s higher than the average speed.
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The Correct Option is B
Solution and Explanation
Step 1: Average speed vₐvg=(500+600+700+800+900)/(5)=700m/s
Step 2: RMS speed vᵣms=√((500²+600²+700²+800²+900²)/(5)) =714m/s
Step 3: Difference =14m/s
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