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physics.ed-ph2005
Thermal Expansion Puzzles
Rajesh R. Parwani
The standard formula that describes the thermal expansion of a solid creates several puzzles for discerning students. Three puzzles are reviewed, and their common resolution discus…
physics.ed-ph2005
Evaluating the Root-Mean-Squared of a Sinusoidal Signal Without Using Calculus
Rajesh R. Parwani
The frequently mentioned root-mean-squared value of an alternating voltage is derived without using calculus.