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- 148
- 5
- Homework Statement
- Kate has a bucket of ice cream and wants to take it on a long car trip into the desert, so she wraps it in a jumper. Is this a good idea? Choose the best answer.
- Relevant Equations
- nope
Apparently the answer is to have the jumper over the bucket. Am I wrong in thinking that the jumper transfers heat to the ice cream, why does it not do so?
A similar question elsewhere was "Colin claims to have built a refrigerator alternative which works without any power supply. It is a box with a wet blanket over it; the blanket is kept wet as a tap is allowed to drip onto its corner. How does it work?" where apparently it takes energy to evaporate the water on the blanket and thus it keeps is cool. Similarly I thought that warm water would cause the blanket to transfer heat?
A similar question elsewhere was "Colin claims to have built a refrigerator alternative which works without any power supply. It is a box with a wet blanket over it; the blanket is kept wet as a tap is allowed to drip onto its corner. How does it work?" where apparently it takes energy to evaporate the water on the blanket and thus it keeps is cool. Similarly I thought that warm water would cause the blanket to transfer heat?