Use the following information to answer questions 17 and 18. Two identical empty metal containers P and Q are placed over

      

Use the following information to answer questions a) and b)
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 100oC the burner are turned off. Identical test tubes containing water are suspended in each container without touching the sides as shown in Figure 3.
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a) Explain why the container Q may become hot faster than P.
b) Explain why the water in test-tube in P becomes hot faster than in Q

  

Answers


John
a) P loses more heat supplied by the burner than Q because dull surfaces are good emitters of heat. Q being a shiny surface, is a poorer radiator/ emitter of heat thus retains more heat absorbed.

b) Dull surfaces are good absorbers of heat. Container P therefore, gives more heat the test tube than container Q.
johnmulu answered the question on April 17, 2017 at 07:43


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