Yami pours powdered cocoa mix into milk and stirs it. Then she microwaves the mixture for three minutes. When she takes the cup out, the handle is very warm. Steam rises from the cup, so she blows it before taking a sip. In which part of this scenario can convection be best observed?
Answers
Answer : Convection can be best observed when "Steam rises from the cup"
Explanation :
There are 3 modes of transfer of heat.
1) Conduction : This is the transfer of heat through solid medium. For example, when a metal rod is heated at one end, after some time, the other end feels warm. Here heat transfers through the solid metal.
2) Convection : This is the transfer of heat through the liquid medium. For example, when water is heated, the bottom layer gets heated first. This layer moves up and replaces the colder layer. This continues and the liquid is heated.
3) Radiation : This mode of transfer of heat does not need any medium. For example, the heat that we receive from the sun.
When Yami takes the cup out of the microwave, she sees steam rising from the cup. This indicates that the cocoa-milk mixture has boiled. The heat energy from microwave radiation is absorbed by the milk and in turn the milk gets heated. The transfer of heat through milk is an example of convection.
Therefore the part of scenario , convection can be best observed when steam rises from the cup
Answer:
Steam rises from the cup
Explanation:
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