6 papers
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…
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.
Complexity: An Introduction
Rajesh R. Parwani
This article summarises a Web-book on "Complexity" that was developed to introduce undergraduate students to interesting complex systems in the biological, physical and social scie…
Bounds On The Sum Of A Divergent Series
Rajesh R. Parwani
Given a truncated perturbation expansion of a physical quantity, one can, under certain circumstances, obtain lower or upper bounds (or both) to the sum of the full perturbation se…
The Free Energy of Hot QED at Three and Half Loops
Rajesh Parwani, Claudio Coriano`
The computation of order and contributions to the pressure of massless quantum electrodynamics at a temperature is overviewed.
Dimensional Continuation of Gauge-Invariant Quantities in Yang-Mills Theory
Rajesh R. Parwani
Consideration of some perturbatively calculated gauge-invariant expectation values of local noncomposite operators in pure Yang-Mills theory indicates that those expectation values…