In a gas sample of helium gas, two molecules of the gas come closer & exchange momentum, then

kinetic energy is not conserved in the process.

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velocities of molecules will get exchanged.

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velocities of both molecules remain same.

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momentum of system increases.

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Solution

The correct option is B velocities of molecules will get exchanged.
Collision is elastic & masses of both the molecule of helium gas will be same, therefore velocities will exchange.

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In a gas sample of helium gas, two molecules of the gas come closer & exchange momentum, then

The correct option is B velocities of molecules will get exchanged. Collision is elastic & masses of both the molecule of helium gas will be same, therefore velocities will exchange.

The correct option is B velocities of molecules will get exchanged.
Collision is elastic & masses of both the molecule of helium gas will be same, therefore velocities will exchange.