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Question
Why does hot air rise from pavement on a hot summer day?(1 point)
Responses
Due to convection
Due to convection
Due to conduction
Due to conduction
Due to insulation
Due to insulation
Due to radiation
Due to radiation
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The correct answer is:
Due to convection.
how
Hot air rises from the pavement on a hot summer day due to convection. Convection is the process by which heat is transferred through a fluid (in this case, the air) when warmer, less dense fluid rises and is replaced by cooler, denser fluid. As the pavement absorbs heat from the sun, it transfers that heat to the air molecules in direct contact with it. These heated air molecules become less dense and rise, creating a convection current that carries the hot air upward. This is why you may feel a rising heat sensation when standing near pavement on a hot day.
Which investigation shows the transfer of heat energy in the absence of matter?(1 point)
Responses
Using electromagnetic waves to investigate radiation
Using electromagnetic waves to investigate radiation
Using particle movement through a solid to investigate conduction
Using particle movement through a solid to investigate conduction
Using a current through fluid to investigate radiation
Using a current through fluid to investigate radiation
Using particles in space colliding to investigate conduction
The correct answer is:
Using electromagnetic waves to investigate radiation.