SC-1456
Radiation
Lower Sec Science · Secondary 2 · Hard · Radiation
A white metal container of hot water cools from 60 °C to 40 °C in 10 minutes. A black metal container of the same size and material also starts at 60 °C in the same room. Compared to the white container, how will the black container’s cooling rate MOST likely differ?
- It cools faster because black is a better emitter of heat radiation
- It cools slower because black absorbs less heat from the air
- It cools at the same rate because colour does not affect heat loss
- It does not cool at all because black surfaces trap heat
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