Asked by maribel
Which is an example of convection currents?
marshmallows toasting over a campfire
a pot being heated by an electric burner
feet getting hot when stepping across sand
a radiator emitting warm air and drawing in cool air
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A radiator emitting warm air and drawing in cool air.
Explanation: convection is heat transfer by bulk movement of fluid (air or liquid) caused by density differences — warm air rises and cooler air moves in to replace it. The other examples are mainly radiation (toasting marshmallows) or conduction (feet on sand, a pot on an electric burner).
Explanation: convection is heat transfer by bulk movement of fluid (air or liquid) caused by density differences — warm air rises and cooler air moves in to replace it. The other examples are mainly radiation (toasting marshmallows) or conduction (feet on sand, a pot on an electric burner).
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