DP Physics (first assessment 2025)
Question 22M.2.SL.TZ1.a
| Date | May 2022 | Marks available | [Maximum mark: 2] | Reference code | 22M.2.SL.TZ1.a |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | Estimate, State | Question number | a | Adapted from | N/A |
a.
[Maximum mark: 2]
22M.2.SL.TZ1.a
Estimate the power input to the heating element. State an appropriate unit for your answer.
[2]
Markscheme
energy required for milk entering in 1 s = mass x specific heat x 73 ✓
16 kW OR 16000 W ✓
MP1 is for substitution into mcΔT regardless of power of ten.
Allow any correct unit of power (such as J s-1 OR kJ s-1) if paired with an answer to the correct power of 10 for MP2.
Examiners report
Most candidates recognized that this was a specific heat question and set up a proper calculation, but many struggled to match their answer to an appropriate unit. A common mistake was to leave the answer in some form of an energy unit and others did not match the power of ten of the unit to their answer (e.g. 16 W).
