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Physics · 2018
JEE Main 2018 · 2018-04-08 Offline · Q11
The mass of a hydrogen molecule is 3.32 × 10^-27 kg. If 10^23 hydrogen molecules strike, per second, a fixed wall of area 2 cm^2 at an angle of 45°…
The mass of a hydrogen molecule is $\displaystyle 3.32 \times 10^{-27} \mathrm{~kg}$. If $\displaystyle 10^{23}$ hydrogen molecules strike, per second, a fixed wall of area $\displaystyle 2 \mathrm{~cm}^2$ at an angle of $\displaystyle 45$° to the normal, and rebound elastically with a speed of $\displaystyle 10^3 \mathrm{~m} / \mathrm{s}$, then the pressure on the wall is nearly :
Official answer
(1)
$\displaystyle 2.35 \times 10^3 \mathrm{~N} / \mathrm{m}^2$
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JEE Main 2018 Physics question, with the answer from NTA’s final answer key. Where our answers come from.