Recently Active Thermal Physics Questions

1. internal energy of a gas.. KE of a gas... Difference between these two... 2. Is adiabatic process a quasi-static one? Validate ...

A cylinder of radius R made of a material of thermal conductivity k, is surrounded by a cylindrical shell of inner radius R and outer radius 2R. The shell has thermal conductivity k'. The 2 ends of the system are set at 2 dif ...

*Image* Questions are from HCV ...

?? when pt^2=constant is given..? ...

Q. In a cyclic process dU nd dW respectively a) both r 0 b) both non 0 c) dU 0 nd dW may or may nt be 0 d) dU 0 nd dW non 0. ...

a manometer contains a liquid of density p. the difference inthe levels when the manometer rotates with a constant angular velocity w about one of its vertical limbs is?(the two limbs are separated by distance 'a') a)w2a2/2g ...

A long rod has one end at 0°c and other end at a high temperature. The coefficient of thermal conductivity varies with distance as K=K0(1+aX) where K0=102SI unit and a=1m-1.At what distance from d 1st end d temp. will b 100 ...

Paragraph n moles of Helium gas is filled in a thermally insulated vessel at a temperature T. From a very small orifice of area A gas is coming out. Given V is volume of container and M is molecular mass of gas. [Assume outsi ...

*Image* how to apply Wheatsone's bridge and thermal resistence here?? please explain... ...

1..why natural convection cannot take place in gravity free region??? ...

1...WHY WATER IN RANGE 0-4.C EXPANDS ON COOLING AND CONTRACTS ON HEATING ?????? ...

*Image* AC-adiabatic ...

in an insulated vessel,0.05kg steam at 373K and 0.45kg of ice at 253K are mixed .Find final temp of the given mixture. L(fusion)=336J/g L(vap)=2268J/g S(ice)=2100J/kg S(Water)=4200/kg ans given is 273..i am getting 262K my so ...

black body at temp 2880K.energy of radiation emmited by object with wavelength b/w 499nm and 500nm is U1, b/w 999nm and 1000nm is U2,b/w 1499nm and 1500 nm is U3.Then a)U1=0 b)U3=0 c)U1>U2 d)U2>U1 ...

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p-V diagram of an ideal gas enclosed in a container is shown in fig. How the work done by the system on the surrounding is changing i.e., whether it is continuosly increasing , decreasing etc? *Image* ...

HCV pg 35..q 30 a vertical cylinder of height 100cm contains air at a constant temperature.the top is closed by a frictionless light piston.The atmosspheric pressure is equal to 75 cm of Hg.mercury is slowly poured over the p ...

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MULTI Q. Specific heat of a substance can be (a) finite (b) infinite (c) zero (d) negative ...

Q. Prove that internal energy of one mole of a Van der Waals gas is given by U = CvT - a/Vm ...

HCV pg 35 q 33 A uniform tube closed at one end,ccontains at one end contains a pallet of mercury 10cm long.When the tube is kept verticallywith the closed end upward,length of the air colummn trapped is 20 cm. Find the lengt ...

Two bodies of masses m1 and m2 and specific heat capacities s1 and s2 are connected by a rod of lenght L crossectional area A,thermal conductivty K and negligible heat capacity.The whole system is thermally insulated.At time ...

2 moles of an ideal diatomic gas are in the cylinder at temperature T. Suppose on supplying heat to the gas its temperature remains constant but' n ' moles get dissociated into atoms. IF heat supplied to the gas is 0.25 RT, t ...

a constant electric current flows along a uniform wire with cross sectional radius R and heat conductivity coeff. K...A unit volume of wire generates thermal power α.Find the temp as function of distance r from the axis of t ...

column1- A). C=CV-2R B)PV3=constant C) C=CV+2R D)P=2V5 COLUMN 2- P) if volume increases then tep. will also increase Q) if volume increases then tep. will decrease R) For expansion the heat will hav to be supplied to the gas ...

MULTIPLE ANSWER QUESTION 1) A partition divides a container having insulated walls into two compartments 1 and 2 . The same gas fills the two compartments whose initial parameters are given. The partition is a conducting wall ...

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Q1. While gas from a cooking cylinder is used, pressure does not fall appreciably till the last few minutes. Why? Q2. When we place a gas cylinder on a van and the van moves, does the kinetic energy of the molecules increase? ...

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A gas of temperature T is enclosed in a contained whose walls are (initially) at temperature T1. Does the gas exert a higher pressure on the walls of the container when T1<T or when T1>T? ...