The student sets up the apparatus as shown in Fig. 2.1 and Fig. 2.2.
Read the thermometer and enter the temperature in Table 2.1 at time $t = 0$.
Fill in the column headings with suitable units.
Complete the time entries.
Describe in detail one precaution the student must take so that the temperature measurements are as accurate as possible.
Identify the anomalous temperature reading for warm water and explain why you judged it to be anomalous.
Use the temperature readings in Table 2.1 to calculate the temperature decrease of the hot water in the test-tube after cooling for 180 s in both the beaker of cold water and the beaker of warm water.
Use your answers to (d)(ii) to determine how the beaker water temperature affects the rate at which the hot water in the test-tube cools. State your conclusion.
Suggest one improvement to the experimental procedure in (a) and (b) so that a more valid comparison can be made between the two rates of cooling.