Physics · May / June 2024 · Paper 41 · Question 3
0625
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Fig. 3.1 shows a small block of ice floating in a beaker of warm water. block of ice warm water Fig. 3.1
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3(a)[1]
(they / particles in ice) vibrate (about a fixed position) OR particles in water move throughout the liquid
3(b)(i)[1]
conduction
3(b)(ii)[2]
2.6 × 104 J
c = (Δ)E / mΔθ OR (ΔE =) mcΔθ OR 0.34 × 4200 × 18 OR 2.6 × 10N (J)
3(b)(iii)[3]
density (of water next to the ice) increases
cold(er) water sinks
warm(er) water replaces cold water OR warm(er) water rises OR making a convection current
3(b)(iv)[2]
internal energy decreases AND (average) kinetic energy (of particles) decreases
kinetic energy decreases
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