I Unknown formula

Summary
Unknown formula
What is this formula?
q=λ⋅S⋅∪_x
What does s and lambda mean?
 

fresh_42

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Could be potential times vacuum permittivity times surface equals charge (electromagnetic field between to plates).
 
I know that this formula is related to the heating of the rod and the heat flux.
In this case, can λ be the coefficient of thermal conductivity, and s is the surface area through which heat passes?
 

fresh_42

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I know that this formula is related to the heating of the rod and the heat flux.
In this case, can λ be the coefficient of thermal conductivity, and s is the surface area through which heat passes?
Sure. But without any description it remains guesswork. Thermal conductivity has plenty of similar formulas, see https://en.wikipedia.org/wiki/Thermal_conductivity
 

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