Question Answers

Which one of the following would raise the temperature of 20 g of water at 30 degree C most when mixed with? Which one of the following would raise the temperature of 20 g of water at 30 degree C most when mixed with? September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter [...]

Rate of heat flow through two conducting rods of identical dimensions having thermal conductivities K_(1) and K_(2) and Q_(1) and Q_(2) when their ends are maintained at the same difference of temperature individually. When the two rods are joined in series with their ends maintained at the same temperature difference (as shown in the figure), [...]

RMS speed of a monoatomic gas is increased by 2 times. If the process is done adiabatically then the ratio of initial volume to final volume will be RMS speed of a monoatomic gas is increased by 2 times. If the process is done adiabatically then the ratio of initial volume to final volume will [...]

An object is cooled from 75^0C to 65^0C in 2 minutes in a room at 30^0C the time taken to cool the same object from 55^0C to 45^0C in the same room is An object is cooled from 75^0C to 65^0C in 2 minutes in a room at 30^0C the time taken to cool the [...]

A graph is plotted with PV/T on y-axis and mass of the gas along x-axis for different gases. The graph is A graph is plotted with PV/T on y-axis and mass of the gas along x-axis for different gases. The graph is September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter 15 - [...]

Internal energy of n1 ​moles of hydrogen at temperature T is equal to the internal energy of n2 ​moles of helium at temperature 2T. Then the ratio n1 /n2 ​ is: Internal energy of n1 ​moles of hydrogen at temperature T is equal to the internal energy of n2 ​moles of helium at temperature 2T. [...]

If pressure and temperature of an ideal gas is doubled and volume is halved, the number of molecules of the gas If pressure and temperature of an ideal gas is doubled and volume is halved the number of molecules of the gas September 5, 2021 Category: Arihant Physics by D.C Pandey , Chapter 15 - [...]

In a certain region of space, there are n number molecules per unit volume. The temperature of the gas is T. The pressure of the gas will be: In a certain region of space there are n number molecules per unit volume. The temperature of the gas is T. The pressure of the gas will [...]

In a cyclic process shown in the figure, an ideal gas is adiabatically taken from B and A, the work done on the gas during the process B−A is 30 J, when the gas is taken from A−B the heat absorbed by the gas is 20 J. The change in internal energy of the gas [...]

Sixty per cent of given sample of oxygen gas when raised to a high temperature dissociates into atoms. Ration of its initial heat capacity (at constant volume) to the final heat capacity (at constant volume) will be : Two monoatomic ideal gas at temperature T1 and T2 are mixed. There is no loss of energy. [...]