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 Form 1 Physics heat transfer topical questions and answers

Two identical empty metal containers P and Q are placed over identical Bunsen burners and the burners lit. P is dull black while Q is shiny bright. After each container attains a temperature of #100^0C# the burners are turned off. Two identical test tubes containing water are suspended in each container
without touching the sides as shown in figure 3.
Explain why the water in test tube in P becomes hot faster than Q.

 (1m 45s)
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Answer Text:
- Dull surfaces are good absorbers of heat. Container P therefore gives more heat