The diagram illustrates the apparatus used to carry out an experiment to find the specific heat capacity of a metal. During the experiment, a heater is turned on for $t\,\text{s}$ and the rise in temperature $\Delta\theta$ of a block of the metal is measured in $^\circ\text{C}$. Which equation is used to calculate the specific heat capacity of the metal?
- A$c = \frac{P}{t m \Delta\theta}$
- B$c = \frac{P t}{m \Delta\theta}$
- C$c = \frac{t m \Delta\theta}{P}$
- D$c = \frac{m \Delta\theta}{P t}$