Wood is a poor conductor,which means that heat is slow to transfer——even when wood is very hot.Why can firewalkers safely walk barefoot on red-hot wooden coals,but not safely walk barefoot on red-hot pieces of iron?If you stick a metal rod in a s
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Wood is a poor conductor,which means that heat is slow to transfer——even when wood is very hot.Why can firewalkers safely walk barefoot on red-hot wooden coals,but not safely walk barefoot on red-hot pieces of iron?If you stick a metal rod in a s
Wood is a poor conductor,which means that heat is slow to transfer——even when wood is very hot.Why can firewalkers safely walk barefoot on red-hot wooden coals,but not safely walk barefoot on red-hot pieces of iron?
If you stick a metal rod in a snowbank,the end in your hand will soon become cold.Does cold flow from the snow to your hand?
Wood is a poor conductor,which means that heat is slow to transfer——even when wood is very hot.Why can firewalkers safely walk barefoot on red-hot wooden coals,but not safely walk barefoot on red-hot pieces of iron?If you stick a metal rod in a s
1.The red-hot wooden coals can only transfer heat slowly,but a piece of iron is a very good heat conductor.So the heat will not transfer from the wooden coals as quickly as from the iron.Hence the fireworks won't get hurt by walking on the red-hot wooden coals when walking on red-hot iron can be dangerous.
2.No,the heat flows from the objects with a higher temperature to the objects with a lower temperature.
So the heat actually flows from the your hand to the snow.
木头导电不良，这就表明传导热很慢--即使木头很热也是如此。为什么蹈火者可以安然无恙地赤脚在火红的木炭上行走，而赤脚在火红的铁上面却不行呢？
你如果将一根铁棍插入雪堆里，你手中的那一头很快就会变冷。是不是寒冷从雪传导到你的手上了呢？...
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木头导电不良，这就表明传导热很慢--即使木头很热也是如此。为什么蹈火者可以安然无恙地赤脚在火红的木炭上行走，而赤脚在火红的铁上面却不行呢？
你如果将一根铁棍插入雪堆里，你手中的那一头很快就会变冷。是不是寒冷从雪传导到你的手上了呢？
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