Angstrom's Method Of Determining Thermal Conductivity P-900D

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Angstrom's Method Of Determining Thermal Conductivity P-900D

Angstrom's Method Of Determining Thermal Conductivity P-900D

Category: Physics

Model No:P-900D

Angstrom developed a method of determining the thermal conductivity of a metal rod by applying an alternating heat pulse to one end while leaving the other end at room temperature. Doing this causes a heat wave to propagate down the rod and creates an observable temperature difference between two points on the rod. This also creates a varying phase relationship between the measured temperature recorded at the first and second points.The thermal conductivity of the rod can be determined if the temperature of these two points is measured as a function of time.

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Part of the heat traveling down the length of the rod will be transmitted through conduction, part will heat the rod itself, and part of the heat will be lost to the air through radiation. The following theory follows the development given in Advanced Practical Physics by Worsnop and Flint.

Thermal conductivity is defined through the rate of heat energy lost through the surface of some object.

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