DP Physics (last assessment 2024)
Question 22M.2.SL.TZ1.2d.i
| Date | May 2022 | Marks available | [Maximum mark: 1] | Reference code | 22M.2.SL.TZ1.2d.i |
| Level | SL | Paper | 2 | Time zone | TZ1 |
| Command term | State | Question number | d.i | Adapted from | N/A |
d.i.
[Maximum mark: 1]
22M.2.SL.TZ1.2d.i
Cold milk enters a small sterilizing unit and flows over an electrical heating element.
The temperature of the milk is raised from 11 °C to 84 °C. A mass of 55 g of milk enters the sterilizing unit every second.
Specific heat capacity of milk = 3.9 kJ kg−1 K−1
The milk flows out through an insulated metal pipe. The pipe is at a temperature of 84 °C. A small section of the insulation has been removed from around the pipe.
(d.i)
State how energy is transferred from the inside of the metal pipe to the outside of the metal pipe.
[1]
Markscheme
conduction/conducting/conductor «through metal» ✓
Examiners report
Many candidates recognized that heat transfer by conduction was the correct response. This was a "state" question, so candidates were not required to go beyond this.
