Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will

Even Carnot engine cannot give $$100\% $$ efficiency because we cannot

At what temperature is the $$r.m.s$$ velocity of a hydrogen molecule equal to that of an oxygen molecule at $${47^ \circ }C?$$

1 mole of a gas with $$\gamma = 7/5$$ is mixed with $$1$$ mole of a gas with $$\gamma = 5/3,$$ then the value of $$\gamma $$ for the resulting mixture is