P and Q are in thermal equilibrium. State the meaning of thermal equilibrium.
The values for P and Q are listed in Table 3.1. At the start, P and Q are both at the same temperature. P receives $24\,\text{kJ}$ of thermal energy. After a period of time, P and Q are again at the same temperature. The surroundings are perfectly insulated from P and Q. Determine the temperature change $\Delta T$ of Q.
The temperature of the nitrogen gas rises from $0\,^{\circ}\text{C}$ to $210\,^{\circ}\text{C}$. Determine the work done on the gas.
Determine the value of $N$, the number of nitrogen gas molecules.
A nitrogen molecule has mass $4.7 \times 10^{-26}\,\text{kg}$. Calculate the root-mean-square (r.m.s.) speed of a nitrogen molecule at $210\,^{\circ}\text{C}$.