At about 4°C, a certain amount of water has maximum

Dimensional formula of specific heat capacity is

The scale on a steel meter rod is calibrated at 20°C. What will be the error in the reading of 50 ern at 27°C? Take, a = 1.2 x 10.5 °C^-1

The rates of cooling of two different liquids put in exactly similar calorimeters and kept in identical surroundings are the same if

Why, water is used as an coolant in the radiator of cars?

Black body radiation is white. Comment.

Does the boiling point of water change with pressure ?

If all the objects radiate electromagnetic energy, why do not the objects around us in everyday life become colder and colder?

White clothes are more comfortable in summer while colourful clothes are more comfortable in winter. Why ?

By how much the temperature of a copper rod to be raised so as to increase its length by 1% ? Given that coefficient of linear expansion of copper = 1.7 x 10^-5 K^-1 . 

The density of mercury is \(13.6\times { 10 }^{ 3 }Kg\quad { m }^{ -3 }\)  at 0^o C and its coefficient of volume expansion is \(1.82\times { 10 }^{ -4 }{ K }^{ -1 }\)  . Find the density at 50^o C.

Which of two has larger value of specific heat - sand or water ?

Why two layers of cloth of equal thickness provide warmer coucring than a single layer of cloth double thickness ?

Express 60°C in ⁰F

A box having total surface area 0.05 m² and of 6 mm thick side walls is filled with melting ice and kept in room. Calculate the thermal conductivity of the box material if 0.5 kg of ice melts in 1 h. The room temperature is 40^o C and latent heat of fusion of ice = \(3.33\times { 10 }^{ 5 }J{ kg }^{ -1 }\)

Two vessels A and B of different materials but having identical shape, size and wall thickness are filled with ice and kept at the same place. Ice melts at the rate of 100 g min^-1 and 150 gmin^-1 in A and B respectively. Assuming that heat enters the vessels through the walls only, calculate the ratio of thermal conductivities of their materials.

The tungston filament of an electric lamp has a length of 0.25 m and a diameter of 6 x 10-5 m. The power rating of the lamp is 100 W. If the emissivity of the filament is 0.8, estimate the steady temperature of the filament. Stefan's constant = 5.67 x 10-8 W/m²/k⁴

A circular disc made by iron is rotating about its axis of rotation with a uniform angular speed \(\omega \)
Determine the change in the linear speed of particle at the rim in percentage. The disc of rim is slowly heated from 20^o C to 50^o C keeping the angular speed uniform. Give that coefficient of linear expansion for the material of iron is  \(1.2\times 10^{ -5\quad }\)\(^{0}\)C^-1

An ice box is built of wood 1.75 cm thick lined inside with cork 2 em thick. If the temperature of the inner surface of the cork is 0°C and that of the outer surface of the wood is 12°C, what is the temperature of the interface ? The thermal conductivity of wood is 0.0006 and that of cork is 0.00012 CGS units