A student investigates the temperature change when cold water is added to hot water in a beaker.
The student first records the room temperature θR=21 ∘C\theta_{\text{R}} = 21\ ^{\circ}\text{C}θR=21 ∘C.
Complete the column headings in Table 2.1 by writing the appropriate symbols for the units of total volume of water VVV and temperature θ\thetaθ.
Table 2.1
| V/ _____V / \text{ \_\_\_\_\_}V/ _____ | θ/ _____\theta / \text{ \_\_\_\_\_}θ/ _____ |
|---|---|
| 150 | 85 |
| 180 | 71 |
| 210 | 62 |
| 240 | 56 |
| 270 | 51 |
| 300 | 47 |
State the name of the measuring instrument most appropriate for measuring the volume of water added at each stage.
Explain why it is important to add the cold water without delay at each stage of the experiment.
Explain the purpose of stirring the water before measuring the temperature at each stage.
Suggest two modifications to the apparatus that would minimise the loss of thermal energy from the beaker to the surroundings.
164 exam-style questions on CIE IGCSE Physics Physical quantities and measurement techniques, covering Physical quantities and measurement techniques. Each one has a worked solution and a mark scheme showing where the marks go.