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Meter Based on Earth's Meridian
This section introduces an old definition of 'meter' which uses the Paris meridian line. A 'meter' is about one ten-millionth of the length of a quadrant of the Paris meridian.
2017-10-08, 131👍, 2💬

💬 2017-10-08 Herong: Peter, what's the difference between inaccurate and miscalculated?

💬 2017-10-07 Peter: This explanation is incorrect. You are inferring from speed of light definition and assuming a broader sense of “correct” and wo...

Galilean Diagram of Moving Frames
This section presents a single diagram that represents a moving frame overlaid on a stationary frame. The time axis of the moving frame is rotated towards the moving direction.
2017-09-27, 126👍, 1💬

💬 2017-09-27 Salih Kırcalar: John David Best has his web site Vida İnstitute. He put my articles page in 'Timeflow Theory' 'http://vidainstitute.org/?page_id.. .

What Is Lorentz Factor?
This section introduces Lorentz Factor, which is the factor used in the time dilation and other formulas in special relativity.
2017-09-24, 360👍, 2💬

💬 2017-09-24 Shuvojit khan: There is anothere equation ΔE=PΔT

💬 2017-04-30 Abhishek Dogra: Thanks

PDF Printing Version: Notes on Physics
Information on how to obtain the PDF version of this book for printing.
2017-08-03, 202👍, 2💬

💬 2017-08-03 zanchin: Thank you for the good work!

Meter Based on Seconds Pendulum
This section introduces an old definition of 'meter' which uses a seconds pendulum. A 'meter' is the length of a seconds pendulum, which swings a full cycle in 2 seconds in small angles.
2017-06-14, 224👍, 1💬

💬 2017-06-14 Terry: I am going to try this

Measuring Speed of Light - Roemer's Method
This section describes the method used by Ole Roemer to measure the speed of light using changes of observed eclipse periods of Jupiter's moon.
2016-11-14, 146👍, 1💬

Newton's Second Law of Motion
This section introduces Newton's Second Law of Motion - The acceleration of an object is directly proportional to the net force acting on the object, and inversely proportional to the mass of the object.
2016-09-21, 489👍, 1💬

💬 2016-09-21 jjjjjjjjjr: This pic is awsome

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