Question

Which forms of heat transfer (conduction, convection, and/or radiation) are operative, and which form do you think is dominant? In each case explain your answer. a. The student feels colder when a sudden gust of wind arises. b. After sitting down on a concrete bench, the student feels even colder, especially in that part of the anatomy in contact with the bench c. Seeing some trash being burned in an incinerator, the student stands next to the fire and feels warmer.

Answer 1

a. The student feels colder when a sudden gust of wind arises = convection (heat transfer by mass motion of a fluid. As air or water when the heated fluid is caused to move away from the source of heat.)

b. After sitting down on a concrete bench, the student feels even colder, especially in that part of the anatomy in contact with the bench = conduction (heat spreads through a substance from one place to another generally from higher temperature to lower temperature)

c. Seeing some trash being burned in an incinerator, the student stands next to the fire and feels warmer = Radiation (energy,coming from a source and travels through some material or through space)