Ten questions. The result tells you which lessons you may skip.
A steel spoon and a wooden spoon on the same shelf are at room temperature. The steel one feels colder because
Which way of heat transfer can carry heat across empty space?
A lagged uniform rod \(1\,\text{m}\) long has its ends at \(100\,°\text{C}\) and \(0\,°\text{C}\) in the steady state. The temperature \(0.3\,\text{m}\) from the hot end is
A copper rod (\(k = 400\,\text{W/(m K)}\)) is \(1\,\text{m}\) long and \(1\,\text{cm}^2\) in cross-section, with its ends \(100\,\text{K}\) apart. The heat current is
A quilt keeps a sleeper warm mainly because
The thermal resistance of a rod \(1\,\text{m}\) long, \(1\,\text{cm}^2\) in section, with \(k = 50\,\text{W/(m K)}\), is
Copper (\(k = 400\)) and steel (\(k = 50\,\text{W/(m K)}\)) rods of equal size are joined end to end. The copper end is at \(100\,°\text{C}\) and the steel end at \(0\,°\text{C}\). The junction is at about
Two identical rods carry heat between the same two reservoirs, first side by side and then end to end. The ratio of the heat currents, side by side to end to end, is
Ice \(2\,\text{cm}\) thick forms on a pond in \(4\) hours. With the air temperature unchanged, the ice is \(4\,\text{cm}\) thick after a total of
The outer radius of the lagging on a steam pipe is increased from \(2r_1\) to \(4r_1\), with the surface temperatures unchanged. The heat lost per metre