State what the student must do before the heater is switched on.
Suggest why the student waits a further minute after switching off the heater before taking a reading from the balance.
State the current $I$ and voltage $V$ readings when the heater is switched on.
Using the equation $E = I \times V \times t$ calculate the energy $E$ supplied by the heater when $t = 5.0\,\text{minutes}$.
The mass $m$ of ice melted in $5.0\,\text{minutes}$ is $36.2\,\text{g}$. The specific latent heat of fusion $L$ of ice is given by $L = \frac{E}{m}$. Calculate a value for $L$ and give a unit for your answer.
The teacher tells the student that his value is different from the accepted value. Apart from your answer in (a), suggest two improvements to the experiment.