Question

please answer the above question fast

Answer 1

sorry I don't know sorry

Answer 2

root mean square velocity of ch4 and he is same so
$\sqrt{ \frac{t}{mw} } = const \\ \sqrt{ \frac{t}{16} } = \sqrt{ \frac{300}{4} } \\ \frac{t}{16} = \frac{300}{4} \\ t = 1200k$