Thermal Propert...

Calorimeter helps us to determine

Two rods of the same length and cross-sectional area are joined in series. The thermal conductivity of the rods is in ratio 1:2. The ends are maintained at a temperature T$$_{1}$$ and T$$_{2}$$ as shown in the figure. The sides are thermally insulated. If T$$_{1}$$ > T$$_{2}$$then which of the following graphs represents variation temperature gradient $$ \left( \frac { d T } { dx } \right) $$ with x in steady state?

If temperature difference between two sides of an iron plate 2 cm thick is $${ 10 }^{ 0 }C$$ and thermal conductivity of iron is $$0.02 K cal/smK$$ then heat transmitted through the plate per second per $${ m }^{ 2 }$$ at steady state is:

What equivalent of calorimeter is :

Two 50 g ice cubes are placed into 0.2 kg of water in a closed container made of styrofoam. the water is initially a temperature of $$ -15^0 C $$ . the system is allowed to attain equilibrium. the system is allowed to attain equilibrium . the system does not exchange heat with with surrounding . the average specific heat for for ice between $$ -15^0 c $$ and $$ 0^0 C $$ id $$ 2 kJkg^{-1}K^{-1} $$ latent heat of fusion for ice is is $$ \frac {1000}{3} kjkg^{-1} $$ specific heat for water is $$ 4.2 kJkg^{-1}k^{-1} $$

Two liquids $$A$$ and $$B$$ are at $$30 ^ { \circ } \mathrm { C }$$ and $$20 ^ { \circ } \mathrm { C }$$ respectively. When they are mixed in equal masses the temperature of the mixture is found to be $$26 ^ { \circ } \mathrm { C }$$ . The ratio of specific heats is

Select the correct statement related to heat

An electric heater rated as 2 kW is used to heat 200 kg of water from $$1{ 0 }^{ \circ  }C$$ to $$7{ 0 }^{ \circ  }C$$. Assuming no heat losses, the time take is-

One mole of a perfect gas in a cylinder fitted with a piston has a pressure P, volume V and temperature is increased by 1 K keeping pressure constant , the increase in volume is

The figure shows the face and interface temperature of a composite slab containing four layers of two materials having an identical thickness. Under the steady slate conditions, find the value of temperature $$\theta$$.