#438 Consider the surface of a solid that

Consider the surface of a solid that - Mechanical Engineering

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Free Chegg Question

Consider the surface of a solid that is at an elevated temperature and exposed to cooler surroundings. By what mode(s) is heat transferred from the surface if (1) it is in intimate (perfect) contact with another solid, (2) it is exposed to the flow of a liquid, (3) it is exposed to the flow of a gas, and (4) it is in an evacuated chamber?

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Free Chegg Answer 1

1 conduction 2 convection 3 convection 4radiation

Free Chegg Answer 2

1) conduction because conduction occur due to temp difference in solid or in surface.(not motion)

2)convection because in convection heat flows due to motion(flow of liq)

3)convection (same reason as above,heat transfer due to flow of gas)

4)radiation (radiation is a process in which energetic particles or energetic waves travel through a vacuum)

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