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Because both heat and electricity are mediated by the same particles: Electrons! Conductors usually can be modeled by thinking of electrons as if they're free... flying inside the material. This is called the Free Electron Model. Hence they can travel from one end to the other easily. Electricity is transferred when the electrons face an electric field. ...


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The mechanism for increasing the thermal conductivity is phonon assisted hopping. For a disordered system, one which do not preserve the long range order, the electronic wave function becomes localized. The wave function extent is typically much smaller than the system size and is characterized by the localization length $\xi$, a parameter in theory. In this ...


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If you have not just a uniform heat emitting cylinder but namely solid electrical conductor of certain non-zero diameter then consider that the current travels along its surface layer, not through inner layers. So happens because all electrons are charged '-' thus want to push away each other. Not too rough to say that in this system the heat is produced ...


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Your question is: assuming a rod of radius $R=1$ cm with a fixed heat production per unit volume, totaling $Q=100$ W/m, surface temperature $T_0$ and thermal conductivity $\lambda$, what is the temperature $T(r)$ as a function of $r$? First, observe that within a cylindrical shell of radius $r$, the total heat production is $q=Q(r/R)^2$. The temperature ...


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Take a piece of string (I just use cheap yard twine) and soak it im rubbing alcohol. Then wrap the soaked string around the glass tube along/in the score mark you made. Then light the alcohol soaked string on fire. let it burn for a few seconds then dip the gloss tube in cold water and it will break along you score line.. I personally use this method in ...


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Yes of course, the materials that are used for thermal insulation applications,like polystyrene, mineral wool and polyurethane have such characteristics.


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You will require the specific heat capacity values of water, beaker and iron assuming what you used in the lab was pure iron weight. these are usually available online. now principle of calorimetry tells us that assuming no heat is lost to the surroundings heat lost by the hot body is equal to heat gained by the cold body. let room temperature be T(r) and ...



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