Physics · May / June 2023 · Paper 42 · Question 5
0625
As printed in the paper
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5(a)(i)[2]
= m / V OR m = V
(m =) 1.2 × 4.5 × 6.1 × 2.4 (= 79 kg) OR (m =) 79.056 (kg)
5(a)(ii)[4]
290 s
c = (∆)E / m∆θ OR (∆E =) mc∆θ OR (∆E =) 79 × 1000 × 4(.0) OR (∆E =) 316 000 OR (∆θ =) 4(.0)
P = (∆)E / t OR (∆E =) Pt OR (∆E =) 1100 × t
(t =) mc∆θ / P OR (t =) 79 × 1000 × 4(.0) / 1100 OR (t =) 316 000 / 1100
5(a)(iii)[1]
any one from:
(thermal) energy is transferred to furniture / walls / objects (in the room)(thermal) energy is transferred through windows / doors / floor / ceiling / from the room5(b)[1]
conduction AND convection
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