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350156920 Methods of Heat Transfer Answers

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Course

Applied Heat Transfer تطبيقات انتقال الحرارة (MEP 460)

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King Abdulaziz University

Academic year: 2017/2018

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Moe Joed

King Abdulaziz University

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Adi5 months ago
nice documents
Adi5 months ago
nice documents
Trinity7 months ago
Thanks for the help
Trinity7 months ago
Thanks for the help
Carmen M.1 year ago
it's simple for the students to understand

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Worksheet: Methods of Heat Transfer (conduction, convection, and radiation) Define conduction: transfer of heat by direct contact between materials Define convection: transfer of heat by movement of large volumes of fluids moving to balance average KE (temperature)... hot rise, cool falls Define radiation: transfer of heat not requiring a medium to move it Identify the method of heat transfer that takes place in each illustration. Some illustrations may show more than one form of heat transfer.

1. 2. 3.

Radiation convection conduction

4. 5. 6.

Radiation radiation radiation

7. 8. 9.

Radiation radiation convection

10. 11. 12.

Radiation, conduction conduction convection

In each of the following situations, identify the method of heat transfer taking place (conduction, convection, radiation). More than one process may be occurring.

Hot coffee is stirred with a spoon, the spoon gets hot due to conduction________.
A chair is placed several feet from a fire in a fireplace. The fireplace has a glass screen. The side of the chair facing the fireplace gets warm because of radiation_____.
A certain type of decorative lamp contains colored liquids. These liquids form globs that break off and rise to the top of the liquid. The globs rise due to convection____.
Near the ceiling of a room the air is warmer. The warm air rises because of convection_.
A college student holds the back of his hand near an iron to see if it is hot. Heat is transferred to his hand by radiation.
A heater is placed under one corner of a water bed mattress. Warm water moves throughout the mattress because of convection____.
A certain type of stainless steel cookware has a layer of copper applied to the bottom to help it heat evenly. The copper transfers heat to the pan by conduction___.
In a swimming pool, the water near the surface is slightly warmer. The warm water rises because of convection__.
One end of a copper rod is placed in a flame of a Bunsen burner. Small pieces of wax placed along the rod melt at progressively larger distance from the flame. Heat is transferred through the rod by conduction__.
A house burns down. On the house across the street, all of the vinyl siding is twisted and warped by the heat. The heat was transferred across the street by radiation__.
Warm air over the beach rises while cooler dense air from the ocean rushes in due to convection_.
The metal skewer gets so hot that you drop your marshmallow in the campfire because of conduction__.
A huge rock at the state park gets so hot during the day that you can’t sit on it from radiation__.
You lay on that same rock at night so that you can keep warm by conduction__.
A fireman feels a door and it is hot from the fire on the other side due to radiation_.
The cause of weather systems on earth is convection.

17. You are in the top bunk of a bunk bed and you want to turn the air conditioner on while your

friend on the bottom bunk is fine is caused by convection_.

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