A) the root mean square speed and the average
B) the root mean square speed is 14 m/s higher than the average speed.
C) the root mean square speed is 14 m/s lower than the average speed.
D) the root mean square speed is \[\sqrt{14}\text{ m/s}\]higher than the average speed.
Correct Answer: B
Solution :
[b] \[{{v}_{av}}=\left[ \frac{{{500}^{2}}+{{600}^{2}}+{{700}^{2}}+{{800}^{2}}+{{900}^{2}}}{5} \right]\] \[=700m/s\] and \[=\,12.42\,\times {{10}^{-21}}\,J\] \[=714m/s\] Thus \[{{v}_{rms}}\] is greater than average speed by 14m/s.
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