Recently Active Thermal Physics Questions

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A uniform cylinder of steel of mass M, radius R is placed on frictionless bearings and set to rotate about its vertical axis with angular velocity ω0.After the cylinder has reached the specified state of rotation it is heate ...

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 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. ...

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

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 ...

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 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 ...

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Three rods of identical cross-sectional area and made from the same metal form the sides of an isosceles triangle ABC, right angeled at B. The points A and B are maintained at temperatures T and (√2)T respectively. In stead ...

1. If nitrogen gas molecule goes straight up with its rms speed at 0°c from the surface of the earth and there are no collisions with other molecules, then it will rise to an approx. height of (a) 8 km (b) 12 km (c) 12 m (d) ...

a gas is contained in a metallic container fited with a piston. the piston is suddenly moved in to compress the gas and is maintained at this positon. as time passes the pressure of the gas in the cylinder : 1) increases 2) d ...

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 metal cylinder of 5kg is heated electrically by a 20W heater in a room temp. of 20c. The cylinder temp rises and finally becomes constant at 45C. Assuming rate of heat loss is proportional to the excess temp over surroundin ...

List all the differences b/w ideal and perfect gas! ...

consider a metal disc with a hole in the centre. when the disc is heated will the radius of the hole at centre increase or decrease? ...

One Kg of copper is drawn into a wire of 1mm diameter and a wire of 2 mm diameter. The resistance of the two wires will be in the ratio ...

Ques 1) A solid Copper cube of edge 1 cm is suspended in an evacuated enclosure. It's temperature is found to fall from 100 ° C to 99 ° C in 100 sec. Another solid copper cube of edge 2 cm with similar manner. The time requ ...

Please exp wrt this problem. A piece of iron of mass 100g is kept inside a furnance for long time and thn put in a calorimeter of water equi of 10g containin 240g of water at 20°C.Mixture attains equilibrium temp at 60°C. J ...

The figure shows the initial state of the gas in an insulated cylinder. The gas is ideal and it is given that, Cp/Cv = 1.5. The insulated piston by the help of an external agent is slowly shifted to the right such that the pi ...

find the density and please also explain in brief (i'm confussed how to take the buoyant force....its direction) thanks *Image* ...

The problem is about the derivation of the kinetic gas equation pv=1/3 mnu2 .In the initial lines,in calculating momentum transferred by a molecule to the wall of the container.He is taking the component of the velocity const ...

Heat flows radially outward through a spherical shell of outside radius 3R and inner radius R. The temperature of inner surface of shell is θ1 and that of outer is θ2. The radial distance from centre of shell where the temp ...

A sound wave has frequency 500 Hz and velocity 350m/s. What is the distance between the two particles having phase difference of 60° out of phase ? A)0.7 cm B) 11.6 cm C) 70 cm D) 120 cm ...

A metre scale made of steel is calibrated at 20 degrees Celsius to give correct reading. Find the distance between 50cm mark and 51cm mark if the scale is used at 10 degrees Celsius. Coefficient of linear expansion of steel i ...

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? ...

When a mass of water at 100°C changes to steam at the same temperature, does the internal energy remain unchanged?? If not; why??? ...