Incandescent light bulbs operate at a temperature of 2500 C when bright and 2200 C when dim. The creep rate of the filament when bright is 1.5 times that when dim. Assuming that the activation energy is constant within this temperature range, and that a single creep diffusion mechanism operates, calculate the activation energy in kJ/mol. You can assume that the stress is the same when the light is bright or dim.

Question

Q (in kJ/mol)

Answer 1

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