Unanswered Thermal Physics Questions

1.A metre scale made of steel reads accurately at 20degrees C. In a sensitive experiment distances accurate upto 0.055mm in 1m are required. Find the range of temp in which the experiment can be performed with this metre scal ...

AN IDEAL MONOATOMIC GAS AT NTP IS ENCLOSED IN AN ADIABATIC VERTICAL CYLINDER BETWEEN TWO LIGHT MOVABLE PISTONS (ONE UP AND ONE DOWN). SPRING WITH FORCE CONSTANT K IS CONNECTED TO THE UPPER PISTON AND IS IN A RELAXED STATE INI ...

An aluminium sphere is dipped into water at 100C.If the temperature is increased ,the force of buoyancy 1)will increase 2)will decrease 3)will remain constant 4)may increase or decrease depending on the radius of the sphere. ...

Can you please explain what is steady state with regard to heat transfer through a metal slab?How actually the temperature of different cross-sections become constant with respect to time? ...

1 metre long tube, closed at both ends, is lying horizontally. A mercury column of length 0.1 m is filled in its middle and in the rest two parts air is filled at atmospheric pressure. What will be the displacement of the mer ...

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For an ideal gas, if the molar heat capacity varies as C = Cv + 3aT2 Find the equation of the process in terms of temperature T and volume V, where a is a constant. ...

How is difference in ionisation energy related to valency of d metal? ...

A reversible heat engine takes heat from two sources of 600k and 900k, does work equal to 150 joules and rejects 120 joules of heat into sink at temperature of 300k, find the heat supplied by individual sources? ...

4 metal rods formed a square ABCD. The coeff. Of linear thermal expansion of AB & CD is α and for BC & DA is β.Prove that after increase in temp upto t˚ C, change between the angle of diagonals is { 1/2 (α-β)t}. ...

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A plate made up of anisotropic material is circular in shape at temperature T0 . The coefficient of thermal expansion are αxand αyin two mutually perpendicular directions.When heated slightly the shape of the plate will be ...

Two rods of length L2 and coefficient of linear expansion α2 are connected freely to a third rod of length L1and coefficient of linear expansion α1 to form an isosceles triangle.The arrangement is supported on a knife edge ...

A column of liquid is concentrated i a horizontal tube which is open at both ends.The change in temperature doers not alter the length of this liquid column in the tube.If α be the coeff of linear expansion of the material o ...

The ratio of adiabatic Bulk modulus to the isothermal bulk modulus of a perfect gas with f degrees of freedom will be ? ...

A gas is enclosed in a vessel of volume V at a pressure P.It is being pumped out of a vessel by means of a piston pump with stroke volume v.Find the pressure of the gas in the vessel after n strokes. ...

A gas is enclosed in a vessel of volume V at a pressure P.It is being pumped out of a vessel by means of a piston pump with stroke volume v.Find the pressure of the gas in the vessel after n strokes. ...

n moles of an ideal gas is supplied heat such that its temperature changes from T1toT2 and pressure from P1 to P2.Then the change in entropy of the system ΔS is?? ...

a cylinder containing gas at 27o C is divided into two parts of equal volume each of 100cc and at equal pressure by a piston of cross section area 10.85cm2 . the gas in one part is raised in temperature to 100o C while the ot ...

an ideal gas of molar mass M is contained in a vertical tube of height H , closed at both ends. the tube is acelerating vertically upwards with a accleration g . then the ratio of pressure at the bottom and at the mid point o ...

five moles of helium are mixed with two moles of hydrogen to form a mixture . The molar mass of helim M1=4g and that of M2=2g . then the equivalent molar mass of the mixture will be ? a. 6g b. 13g/7 c. 18g/7 d. none ...

A 100kg block is started with a speed of 2m/s on a long, rough belt kept fixed in a horizontal position. The coefficient of kinetic friction betn. the block and the belt is 0.20. Consider the situation from a frame of referen ...

Two thermally insulated vessels 1 and 2 are fiiled with air at temperature (T1,T2),volumes (V1,V2) and pressure(P1,P2) respectively.If the valve joining the two vessels is opened , the temperature inside the vessel at equilib ...