At $27^{\circ} C$ temperature,the mean kinetic energy of the atoms of an ideal gas is $E_1$. If the temperature is increased to $327^{\circ} C$,then the mean kinetic energy of the atoms will be
- A$\frac{E_1}{\sqrt{2}}$
- B$\sqrt{2} E_1$
- C$2 E_1$
- D$\frac{E_1}{2}$
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