Physics questions
20027 published questions with worked solutions.
- Air is pumped into an automobile tube upto a pressure of 200 kPa in the morning when the air temperature is 22^ . During the day,...
- Two gases A and B having the same temperature T, same pressure p and same volume V are mixed. If the mixture is at same...
- At 10^ , the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110^ , this ratio is
- One litre of an ideal gas at 27^ is heated at a constant pressure to 297^ . Then, the final volume is approximately
- Two balloons are filled, one with pure He gas and the other by air, respectively. If the pressure and temperature of these...
- The air density at Mount Everest is less than that at the sea level. It is found by mountainers that for one trip lasting few...
- During an experiment, an ideal gas is found to obey an additional law Vp^2 = constant. The gas is initially at temperature T and...
- The gas in a vessel is subjected to a pressure of 20 atm at a temperature 27^ . The pressure of the gas in a vessel after...
- Temperature remaining constant, the pressure of gas is decreased by 20%. The percentage change in volume
- A closed container of volume 0.02 m^3 contains a mixture of neon and argon gases at a temperature of 27^ and pressure of 1 10^5 N...
- Which one of the following is not an assumption in the kinetic theory of gases?
- A sealed container with negligible coefficient of volumetric expansion contains helium (a monoatomic gas). When it is heated from...
- At what temperature, the kinetic energy of a gas molecule is half of the value at 27^ ?
- Two perfect gases at absolute temperatures T_1 and T_2 are mixed. There is no loss of energy. The temperature of mixture of...
- The kinetic energy of one mole gas at 300 K temperature is E. At 400 K temperature kinetic energy is E'. The value of E'/E is
- At what temperature will the oxygen molecules have the same root mean square speed as hydrogen molecules at 300 K ?
- The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K, the root mean square speed of gas molecules is v,...
- The temperature at which the mean KE of the molecules of gas is one-third of the mean KE of its molecules at 180^ is
- When temperature of an ideal gas is increased from 27^ to 227^ , its rms speed is changed from 400 m ,s^ -1 to v_s. Then, the v_s...
- The rms velocity of gas molecules is 300 m ,s^ -1 . The rms velocity of molecules of gas with twice the molecular weight and half...