DP Physics (first assessment 2025)

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Question 22M.2.SL.TZ1.2d.iii

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Date May 2022 Marks available [Maximum mark: 2] Reference code 22M.2.SL.TZ1.2d.iii
Level SL Paper 2 Time zone TZ1
Command term Describe Question number d.iii Adapted from N/A
d.iii.
[Maximum mark: 2]
22M.2.SL.TZ1.2d.iii
(d.iii)

Describe one other method by which significant amounts of energy can be transferred from the pipe to the surroundings.

[2]

Markscheme

convection «is likely to be a significant loss» ✓


«due to reduction in density of air near pipe surface» hot air rises «and is replaced by cooler air from elsewhere»

OR

«due to» conduction «of heat or thermal energy» from pipe to air ✓

Examiners report

A few candidates recognized that convection was the third source of heat loss, although few managed to describe the mechanism of convection properly for MP2. Some candidates did not read the question carefully and instead wrote about methods to increase the rate of heat loss (such as removing more insulation or decreasing the temperature of the environment).

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