Five gas molecules chosen at random are found to have speeds of $500,600,700,800$ and $900 m / s$. Then which of the following statements is correct?
  • A
    The root mean square speed and the average speed are the same.
  • BThe root mean square speed is $14 m / s$ higher than the average speed.
  • CThe root mean square speed is $14 m / s$ lower than the average speed.
  • DThe root mean square speed is $\sqrt{14} m / s$ higher than the average speed.The molecules of a given mass of a gas have
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