Question
What is mean free path? Explain and obtain its expression and prove that $\lambda \propto T$ and $\lambda \propto \lambda_{ P }.$
✓
Answer
SELF
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A cylindrical vessel, whose diameter and height both are equal to 30cm, is placed on a horizontal surface and a small particle P is placed in it at a distance of 5.0cm from the centre. An eye is placed at a position such that the edge of the bottom is just visible. The particle P is in the plane of drawing. Up to what minimum height should water be poured in the vessel to make the particle P visible?
An ammeter is to be constructed that can read currents up to 2.0A. If the coil has resistance of $25\Omega$ and takes 1mA for full-scale deflection, what should be the resistance of the shunt used?
→An electron makes $3 \times 10^5$ revolutions per second in a circle of radius $0.5$ angstrom. Find the magnetic field B at the centre of the circle.
→The figure shows two vessels with adiabatic walls, one containing 0.1g of helium $\big(\gamma=1.67,\text{M}=4\text{g-mol}^{-1}\big)$ and the other containing some amount of hydrogen $\big(\gamma=1.4,\text{M}=2\text{g-mol}^{-1}\big).$ Initially, the temperatures of the two gases are equal. The gases are electrically heated for some time during which equal amounts of heat are given to the two gases. It is found that the temperatures rise through the same amount in the two vessels. Calculate the mass of hydrogen.
→Use the formula $\text{v}=\sqrt{\frac{\gamma\text{P}}{\rho}}$ to explain why the speed of sound in air:
Is independent of pressure,
→Is independent of pressure,
Two particles A and B having charges q and 2q respectively are placed on a smooth table with a separation d. A third particle C is to be clamped on the table in such a way that the particles A and B remain at rest on the table under electrical forces. What should be the charge on C and where should it be clamped?
Find the magnitude and direction of the resultant of two vectors $A$ and $B$ in terms of their magnitudes and angle $\theta $ between them.
→Establish the formula for work in the adiabatic process.
A shell of mass $0.020kg$ is fired by a gun of mass $100kg$. If the muzzle speed of the shell is $80ms^{-1}$, what is the recoil speed of the gun?
→The length of a second’s pendulum on the surface of Earth is 1m. What will be the length of a second’s pendulum on the moon?