PH-2154
Thermal radiation
Physics · Secondary 4 · Medium · Thermal radiation
A camper fills a metal bottle with hot soup and leaves it on a table. The outside of the bottle can be painted in one of the following finishes. To keep the soup hot for the longest time, which finish should be chosen?
- Dull black paint
- Shiny silver coating
- Matt dark blue paint
- Dull white paint
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