Thermal energy transport via conduction

AI Thread Summary
The transparency of glass is due to its chemical structure, allowing photons to pass through with minimal distortion. Heat transfer from a gas burner to water occurs through the glass, which is in direct contact with the burner but not with the water. Convection currents can occur in liquids and gases, but not in solid materials like glass, where molecules only vibrate in place. The discussion clarifies that while convection transfers thermal energy in water, it does not occur within the glass itself. Thus, the heat transfer mechanism through the glass is distinct from convection processes in the water.
ellieee
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I don't understand what the question is asking. what I interpret it as is how does thermal energy pass through the layer of glass(air molecules inside), am I right? if I'm not, what is it?
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The glass is transparent not because it has air molecules inside it but because such is its chemical structure that allows for photons to pass through it with small to no distortion. Other than that , yes, the question asks how the heat passes from the gas burner through the glass layer and into the water. The gas burner is in immediate contact with the glass and not with the water.
 
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Delta2 said:
The glass is transparent not because it has air molecules inside it but because such is its chemical structure that allows for photons to pass through it with small to no distortion. Other than that , yes, the question asks how the heat passes from the gas burner through the glass layer and into the water. The gas burner is in immediate contact with the glass and not with the water.
the answer is D, why can't it be B? B is talking about convection current I suppose ?
 
yes we can say that it talks about convection. You can have convection currents in gases and liquids but not in solid substances like glass. The molecules from the outer layer of the glass (those in contact with the burner ) do not move to the inner layer (in contact with the water) they just vibrate afew angstroms around a mean position.
 
Delta2 said:
molecules from the outer layer of the glass (those in contact with the burner )
u mean the surrounding air?
then B is talking about how thermal energy is transferred throughout the whole liquid, which is another idea right?
 
No I mean the outer layer of the glass, the surface of the glass that is in contact with the burner.

B is talking something like we have convection inside the glass, which is not true. But yes the thermal energy throughout the water is transferred through convection.
 
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