IGCSE · 2 · multiple choice
Thermal physics · Question 3
Thermal physics · Original GioPhysics question with a detailed, mark-by-mark answer guide.
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multiple choice1 mark
The specific heat capacity of water is 4200 J/(kg °C). How much energy is needed to raise the temperature of 2.0 kg of water by 15 °C?
- A
560 J
- B
8400 J
- C
63 000 J
- D
126 000 J
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Answer overviewCorrect answer: D — 126 000 J
01
1 markAnswer and reasoning
How to approach it
Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.
- 1
The correct choice is D: 126 000 J
- 2
C forgets the mass. B forgets the temperature rise. A divides where the candidate should multiply.
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