Browse and search thousands of solved questions for your preparation.
Free questions with full explanations — locked behind signup to protect quality.
A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small as compared to the mass of the earth. Then,
The average kinetic energy of a helium atom at 30°C is:
Infinite number of bodies, each of mass 2 kg are situated on x-axis at distance 1m, 2m, 4m, 8m, respectively from the origin. The resulting gravitational potential due to this system at the origin will be:
A container of volume $200 \text{ cm}^3$ contains 0.2 mole of hydrogen gas and 0.3 mole of argon gas. The pressure of the system at temperature $200 \text{ K}$ ($R = 8.3 \text{ J K}^{-1} \text{ mol}^{-1}$) will be:
An iron rod of susceptibility $599$ is subjected to a magnetizing field of $1200 \text{ A m}^{-1}$. The permeability of the material of the rod is: $(\mu_0 = 4\pi \times 10^{-7} \text{ T m A}^{-1})$
Orbital having 3 angular nodes and 3 total nodes is:
Fertilisation in humans is practically feasible only if?
A remote sensing satellite of the earth revolves in a circular orbit at a height of $0.25 \times 10^6$ m above the surface of the earth. If the earth’s radius is $6.38 \times 10^6$ m and $g = 9.8$ ms$^{-2}$, then the orbital speed of the satellite is:
If the K.E. of a body is increased by $300\%$, its momentum will increase by:
The pressure and temperature of two different gases are P and T with volume V for each. If they are mixed, keeping the same volume and temperature, the pressure of the mixture will be:
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the earth's atmosphere? (Given: Mass of oxygen molecule $m = 2.76 \times 10^{-26} \text{ kg}$, Boltzmann's constant $k_B = 1.38 \times 10^{-23} \text{ J K}^{-1}$)
If $C_p$ and $C_v$ denote the specific heats (per unit mass) of an ideal gas of molecular weight $M$, then:
The dependence of acceleration due to gravity g on the distance r from the centre of the earth assumed to be a sphere of radius R of uniform density is as shown in the figure below:
A given sample of an ideal gas occupies a volume $V$ at a pressure $p$ and absolute temperature $T$. The mass of each molecule of the gas is $m$. Which of the following gives the density of the gas?
Two vessels separately contain two ideal gases A and B at the same temperature, the pressure of A being twice that of B. Under such conditions, the density of A is found to be 1.5 times the density of B. The ratio of molecular weight of A and B is:
Electromagnets are made of soft iron because soft iron has:
The magnetic susceptibility is negative for:
For a gas, $R/C_V = 0.67$. This gas is made up of molecules which are:
The unit of Stefan's constant σ is:
The largest freezing point depression among the following 0.10 m solutions is shown by: