Physics · Oct / Nov 2022 · Paper 42 · Question 5
0625
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The question as text
Fig. 5.1 shows an aluminium block after leaving a furnace in a factory. furnace aluminium block solid metal rollers factory worker Fig. 5.1
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5(a)[3]
(E =) 410 000 000 J OR 410 MJ OR 4.1 × 108 J
ΔE = mcΔT OR (ΔE =) mcΔT OR 1200 × 960 × 360
C1 (ΔT =) 360 (°C)
C1
5(b)[3]
(thermal) radiation
electromagnetic / e-m / infrared / IR (radiation emitted from block)
travels to worker OR is absorbed by worker OR travels without needing a medium
5(c)[3]
conduction
delocalised / free / moving electrons
any one from:
(electrons) move (from outer surface) to interior (of rollers)(electrons) travel through(out) the solid / large distances(electrons) collide with distant particleslattice vibrations transfer thermal energy to neighbouring particles OR particles vibrate and cause nearby / adjacent particles to vibrate OR vibrating particles collide with particles transferring energy.
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