Questions by varun

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Explain why Two bodies at different temperatures `T_1` and `T_2` if brought in thermal contact do not necessarily settle to the mean temperature (`T_1` + `T_2`

asked Mar 19, 2022 in 11th Physics

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Explain why The coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific

asked Mar 19, 2022 in 11th Physics

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Explain why Air pressure in a car tyre increases during

asked Mar 19, 2022 in 11th Physics

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Explain why The climate of a harbour town is more temperate than that of a town in a desert at the same

asked Mar 19, 2022 in 11th Physics

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A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume

asked Mar 19, 2022 in 11th Physics

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In changing the state of a gas adiabatically from an equilibrium state A to another equilibrium state B, an amount of work equal to 22.3 J is done on the system. If the gas is taken from state A to B via a process in which the net heat absorbed by the system is 9.35 cal, how much is the net work done by the system in the latter case ? (Take 1 cal = 4.19

asked Mar 19, 2022 in 11th Physics

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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : What is the final pressure

asked Mar 19, 2022 in 11th Physics

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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : What is the change in

asked Mar 19, 2022 in 11th Physics

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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : What is the change in

asked Mar 19, 2022 in 11th Physics

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Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Answer the following : Do the intermediate states of

asked Mar 19, 2022 in 11th Physics

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A steam engine delivers `5.4×10^8`J of work per minute and services `3.6 × 10^9`J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per

asked Mar 19, 2022 in 11th Physics

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An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 joules per second. At what rate is the internal energy

asked Mar 19, 2022 in 11th Physics

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A thermodynamic system is taken from an original state to an intermediate state by the linear process shown in Fig. ) Its volume is then reduced to the original value from E to F by an isobaric process. Calculate the total work done by the gas from D to E to

asked Mar 19, 2022 in 11th Physics

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A refrigerator is to maintain eatables kept inside at 90C. If room temperature is 360C, calculate the coefficient of

asked Mar 19, 2022 in 11th Physics

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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the ratio (or fraction) of the molecular volume

asked Mar 19, 2022 in 11th Physics

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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. Estimate the volume of a water

asked Mar 19, 2022 in 11th Physics

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The density of water is 1000 kg `m^(–3)`. The density of water vapour at 100 °C and 1 atm pressure is 0.6 kg `m^(–3)`. The volume of a molecule multiplied by the total number gives ,what is called, molecular volume. What is the average distance between atoms (interatomic distance)

asked Mar 19, 2022 in 11th Physics

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A vessel contains two nonreactive gases : neon (monotonic) and oxygen (diatomic). The ratio of their partial pressures is 3:2. Estimate the ratio of (i) number of molecules and (ii) mass density of neon and oxygen in the vessel. Atomic mass of Ne = 20.2 u, molecular mass of `O_2`= 32.0 u. Example

asked Mar 19, 2022 in 11th Physics

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A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 27 °C. Obtain the ratio of (i) average kinetic energy per molecule, and (ii) root mean square speed vrms of the molecules of the two gases. Atomic mass of argon = 39.9 u; Molecular mass of chlorine = 70.9 u. Example

asked Mar 19, 2022 in 11th Physics

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Uranium has two isotopes of masses 235 and 238 units. If both are present in Uranium hexafluoride gas which would have the larger average speed ? If atomic mass of fluorine is 19 units, estimate the percentage difference in speeds at any temperature.Example

asked Mar 19, 2022 in 11th Physics

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