Parsevalstheorem

An Integral Result from Parseval's Theorem

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Introduction: In this Insight article,  Parseval's theorem…
BondiKcalculus

Relativity Using the Bondi K-calculus

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Although Special Relativity was formulated by Einstein (1905),…
RelativityVariables

Relativity Variables: Velocity, Doppler-Bondi k, and Rapidity

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Traditional presentations of special relativity place emphasis…
linearacceleration

Frames of Reference: Linear Acceleration View

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My previous Insight, Frames of Reference: A Skateboarder's View,…
inferometer

Fabry-Perot and Michelson Interferometry: A Fundamental Approach

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Fabry-Perot Effect: The Fabry-Perot effect is usually treated…
SchwarzschildGeometry4

The Schwarzschild Geometry: Part 4

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  In the last article, we looked at various counterintuitive…
SchwarzschildGeometry2

The Schwarzschild Geometry: Part 2

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  At the end of part 1, we looked at the form the…
SchwarzschildGeometry1

The Schwarzschild Geometry: Part 1

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  Not long after Einstein published his Field Equation,…
rollingmotion

Explaining Rolling Motion

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Although rolling wheels are everywhere, when most people are…
entropy

Grandpa Chet's Entropy Recipe

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How do you determine the change in entropy for a closed system…
Schwarzschild

Orbital Precession in the Schwarzschild and Kerr Metrics

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The Schwarzschild Metric A Lagrangian that can be used to describe…
Precessionrelaitivity

Precession in Special and General Relativity

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The Absolute Derivative In relativity we typically deal with…
spacetimetetrad

Tetrad Fields and Spacetime

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A spacetime is often described in terms of a tetrad field, that…

Relativity on Rotated Graph Paper

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This Insight is a follow up to my earlier tutorial Insight (Spacetime…
basickinematics

Basic Kinematics

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There is an interesting thing in teaching of Classical Mechanics.…
kinematics

Rare Kinematic Formula

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Here we present some useful kinematic fact which is uncommon…
angularvelocity

Elementary Construction of the Angular Velocity

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Physics books  seldom contain accurate definition of the angular…
physics_vectors

Frequently Made Errors in Vectors - Elementary Use

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  A vector has magnitude and direction. Pictorially,…
lightcone7_3

LightCone7 Tutorial Part III - How Things are Computed

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In Part I and Part II of this mini-series, we have briefly discussed…
lightcone72

LightCone7Combo Tutorial Part II - Charts

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Part I dealt with the basic user interface of LightCone7Combo.…
lightcone7

LightCone7Combo Tutorial Part I

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LightCone 7 Combo is a versatile tabulating/charting cosmological…
blackholesforce

Centrifugal Force Reversal Near A Black Hole

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My goal in this article is to derive a simple equation for the…
birktheo

A Short Proof of Birkhoff's Theorem

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Birkhoff's theorem is a very useful result in General Relativity,…
heat errors

Frequently Made Errors in Heat - Elementary Level

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1. Heat, Work, Internal Energy and Kinetic Energy "If heat is…
Coriolis

Frequently Made Errors - Pseudo and Resultant Forces

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  1. Real versus Fictitious Pseudo, or "fictitious",…
renormalization2

Why Renormalisation Needs a Cutoff

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This is a follow on from my paper explaining renormalisation.…
errors springs

Frequently Made Errors in Mechanics - Springs

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  1. Springs in Series "A spring of constant ##k_1##…
impact errors

Frequently Made Errors in Mechanics - Momentum and Impacts

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    An impact is an impulse (change of momentum)…
hydrostatics

Frequently Made Errors in Mechanics - Hydrostatics

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  1. Archimedes' Principle X "When a body is placed…
gausslaw

A Partial "Derivation" of Gauss's Law

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Gauss's law was formulated by Carl Friedrich Gauss in 1835. It…
error handling

Frequently Made Errors in Equation Handling

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  1. Algebra versus Arithmetic When numerical values…
kinematic errors

Frequently Made Errors in Mechanics - Kinematics

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    Kinematics is the subset of dynamics…
mistakes moments

Frequently Made Errors in Mechanics - Moments

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  The term "moment" is used in various ways in Physics…