Brain Teasers
Best for a Cold Night
Which keeps you warmer, a two-inch thick blanket or two blankets one inch thick each? The blankets are made of the exact same material.
Answer
The two blankets one inch thick each. The layer of air between the two blankets acts as insulation too.Hide Answer Show Answer
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Good show! Keep it up!
very interesting. May I request more information on this? thanks.
In general, whenever you have a substance that is not moving, you have a heat insulator. Since there is "dead air" between the blankets, it provides more mass for the heat to have to transfer through, and therefore more insulation. Three layers of material, even if one of the layers is air, is always better than two.
I would like to add to this since I have a degree in chemical engineering. When ever two objects are placed together, there is resistance to heat flow since there is a gap between the two surfaces, no matter how smooth the surfaces. The gap is usually filled with air, which is a poor conductor of heat. A way to reduce the contact resistance is to apply pressure or apply a liquid substance the is good conductor of heat.
I got it pretty easily, good one!
Except I've never seen a blanket two inches thick
Except I've never seen a blanket two inches thick
i got it. that was a good one.
Easy but good. Who would have thought they taught this in chemical engineering?
Knew that!
The same principle applies to insulation in a Thermos.
The same principle applies to insulation in a Thermos.
I GET ALOT OF THESE SCIENCE ONE RIGHT,IM MUST BE SMART
i love science!!!and this question is very easy!!!
i love science!!!and this question is very easy!!!
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