A solid sphere and a hollow sphere of the same material and radius are heated to the same temperature and allowed to cool in the same environment. Which sphere will have a higher initial rate of cooling?

Two objects are in thermal equilibrium. Which of the following statements is true?

If object A is in thermal equilibrium with object B, and object B is in thermal equilibrium with object C, what can be said about the temperatures of objects A and C?

A lead bullet of 10 g travelling at $300\,m/s$ strikes against a block of wood and comes to rest. Assuming $50\%$ of heat is absorbed by the bullet, the increase in its temperature is (specific heat of lead $= 150J/kg,K)$

Two identical isolated containers A and B contain ideal gases with the same number of moles. Container A is at a temperature $T_A$ while container B is at a temperature $T_B = 2T_A$. A third identical container C is evacuated and brought into thermal contact with A and then with B. If the final temperature of C is $T_C$, which of the following relations is correct?

Which unit is NOT a unit of temperature?

A body cools from 50°C to 40°C in 5 minutes. The surrounding temperature is 20°C. In the next 5 minutes, it will cool approximately to:

Two bodies A and B are in thermal equilibrium with a third body C. Which of the following statements is TRUE according to the Zeroth Law of Thermodynamics?

A metal rod expands by $1 imes 10^{-3}$ m when its temperature is raised by $50 ^\circ C$. If the original length of the rod was 1 m, what is its linear coefficient of thermal expansion?

An electric immersion heater of 1.08 kW is immersed in water. After the water has reached a temperature of ${100^0}C$, how much time will be required to produce 100 g of steam

Which of the following the scalar quantity is