Answered: Considering the unusual…

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter14: Heat And Heat Transfer Methods

Section: Chapter Questions

Problem 41PE: One easy way to reduce heating (and cooling) costs is to add extra insulation in the attic of a...

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8) Considering the unusual temperature-density relationship of water between 0 °C and 4 °C, how do you expect convection to work in a camping cooler, filled with ice cubes and melted water at approximately 0 °C, and warmer soda cans?

Water close to the surface of a soda can heats up to slightly above 0 °C, thus contracts and increases its mass density, and floats downward due to gravity, being replaced by approximately 0 °C water from the top. The slightly warmed water will cool against ice cube surfaces, expand, and float upwards again.

Convection always moves a gas or liquid upward, next to a warmer surface, due to gravity.

Convection only ever takes place under gravity if you have heating from the top, and cooling from the bottom.

Convection only takes place in gases.

There is no convection in this scenario.

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