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Saturday, 5 November 2016

Heat Conductors

We discuss certain materials as being great conductors of warmth and others as poor conductors. By this, we mean that though one material will promptly retain and pass warm along its length, another will oppose it and attempt to bind the warmth to its source. 

A customary light fire will allow us to play out a couple of straightforward examinations to demonstrate the relative warmth conductibility of different sorts of materials. 


To start with, hold a glass bar to a light fire. Regardless of to what extent you keep it there, the end of the bar which you are holding will stay unaffected by the warmth at the flip side. This is on account of glass is a to a great degree poor conductor of warmth. Be cautious when you expel the bar from the fire, in any case. Glass dependably looks so misleadingly cool—and this won't be the situation with the end of the bar which has been held to the fire. Indeed, it will be uncomfortably hot. So fare thee well. Presently attempt a similar explore different avenues regarding a wooden pole. The end of this will scorch and may conceivably fire up after it has been held to the light for a few moments. 

The end which you are holding will stay cool since wood is additionally a poor conductor of warmth. At long last, take a length of wire and hold one end of this in the light fire. Be set up to drop the wire abruptly, in any case, for inside a brief the wire will have led warm from the light fire to your fingertips to an uncomfortable degree. This will demonstrate that in spite of the fact that glass and wood are poor conveyors of warmth, metal is a decent transmitter. Maybe you can answer the accompanying inquiry now: Why do pans and pots have wooden handles.

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