Physics · May / June 2026 · Paper 22 · Question 4
5054
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The question as text
Figure 4.1 shows a travel mug used to keep a liquid hot. Inside the mug, there are metal walls with a vacuum between the walls. outer metal wall inner metal wall vacuum mug lid Figure 4.1 The mug contains 250 g of water, initially at 90 °C. Over 6.0 hours, the water cools to 75 °C. The specific heat capacity of water is 4.2 J / (g °C).
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4(a)[2]
4(b)[2]
4(c)(i)[2]
4(c)(ii)[2]
4(d)[2]
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