Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is at ${100^{\rm{o}}}C$, while the other one is at ${{\rm{0}}^{\rm{o}}}C$, If the two bodies are brought into contact, then assuming no heat loss, the final common temperature is

Two metal wires of identical dimensions and conductivities $\sigma_1$ and $\sigma_2$ are connected end-to-end. A potential difference is applied across the combined length. If the current is assumed to be uniform across any cross-section, what is the effective conductivity of the combined wire?

10 g of ice at ${0^0}C$ is mixed with 100 g of water at ${50^0}C$. What is the resultant temperature of mixture?

A wire of conductivity $\sigma_1$ is connected in series with another wire of the same dimensions but with conductivity $\sigma_2$. What is the equivalent conductivity of the two-wire system?

Which of the following factors does NOT significantly affect the thermal conductivity of a material?

Woolen clothes are used in winter season because woolen clothes

Two copper wires of identical dimensions are connected in series. If their conductivities are $5.8 imes 10^7 \, S/m$ and $5.6 imes 10^7 \, S/m$ respectively, what is the effective conductivity of the combination?

What is the SI unit of thermal conductivity?

It is hotter for the same distance over the top of a fire than it is in the side of it, mainly because

On a clear sunny day, an object at temperature T is placed on the top of a high mountain. An identical object at the same temperature is placed at the foot of mountain. If both the objects are exposed to sun-rays for two hours in an identical manner, the object at the top of the mountain will register a temperature

A thermos flask is polished well