Question

if you stand in front of a blowing air conditioner, how are you cooling yourself?

• convection
• conduction
• radiation
• coolants

question 10
1 pts
a 50 gallon bucket is at 80 degrees and a paper clip that gets heated up to 100 degrees. which item has more thermal energy?

• the bucket
• the paper clip

Explanation:

For the first question: Convection is heat transfer by moving fluid (air, in this case). The AC blows cool air that carries heat away from the body, which is convection. Conduction requires direct contact with a cooler surface, radiation is heat transfer via electromagnetic waves, and coolants are substances used in the AC system, not the cooling mechanism for the person.
For the second question: Thermal energy depends on temperature, mass, and specific heat. The 50-gallon bucket has a vastly larger mass than the paper clip, so even at a lower temperature, its total thermal energy is greater.

Answer:

1. Convection
2. The bucket