A) \[\frac{\sqrt{3}}{5}\,\,{{v}_{0}}\]
B) \[\frac{\sqrt{3}}{7}\,\,{{v}_{0}}\]
C) \[\frac{1}{\sqrt{7}}\,\,{{v}_{0}}\]
D) \[\sqrt{\frac{3}{7}}\,\,{{v}_{0}}\]
Correct Answer: A
Solution :
\[\frac{{{v}_{2}}}{{{v}_{1}}}\,\,=\,\,\sqrt{\frac{{{\gamma }_{2}},\,\,\,{{m}_{1}}}{{{\gamma }_{1}},\,\,{{m}_{2}}}}\] \[{{v}_{2}}\] = velocity in nitrogen \[{{v}_{1}}\] = velocity in helium
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