JEE Main 2015 Physics question
In an ideal gas at temperature T, the average force that a molecule applies on the walls of a closed container depends on as . A good estimate for q is:
Answer: (3)
Solution
Each collision with a wall reverses the normal component of the molecule's momentum, delivering an impulse . The molecule returns to the same wall after a time , so the collision frequency is . The average force is impulse per collision times
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