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The mass of a hydrogen molecule is 3.32x...

The mass of a hydrogen molecule is `3.32xx10^(-27)`kg. If `10^(23)` hydrogen molecules strike, per second, a fixed wall of area 2`cm^(2)` at an angle of `45^(@)` to the normal, and rebound elastically with a speed of `10^(3)` m/s, then the pressure on the wall is nearly

A

`2.35 xx 10^(2) N/m^(2)`

B

`4.70 xx 10^(2) N/m^(2)`

C

`2.35 xx 10^(3) N/m^(2)`

D

`4.70 xx 10^(3) N/m^(2)`

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A molecule in a gas container hits a horizontal wall with a speed of 200 m*s^(-1) at an angle of 30^@ with the normal and rebounds with the same speed . Is momentum conserved in the collision ? Is the collision elastic or inelastic ?

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Knowledge Check

  • xL of nitrogen at STP contains 3xx10^(22) molecules. The number of molecules in (x)/(2)L of ozone at STP will be-

    A
    `3xx10^(22)`
    B
    `1.5xx10^(22)`
    C
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    D
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  • A force of 10 kg acting on a certain mass for 2 seconds give it a velocity of 10m//s what is the mass in kilograms ?

    A
    5 kg
    B
    7 kg
    C
    3 kg
    D
    2 kg

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