XML Tutorials - Herong's Tutorial Examples
This XML tutorial book is a collection of notes and sample codes written by the author while he was learning XML himself. Topics include introduction to XML, DTD (Document Type Definition), XSD (XML Schema Definition), XPath (XML Path Language), XSL (Extensible Stylesheet Language), XSLT (XSL Transf... 2023-03-09, 11946🔥, 3💬
The Constancy of the Speed of Light
This section provides a thought experiment to help understanding the second assumption of the special theory of relativity: The constancy of the speed of light. 2022-11-19, 1727🔥, 72💬
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. 2022-11-12, 969🔥, 3💬
Measuring Speed of Light - Fizeau's Method
This section describes the method used by Armand Fizeau to measure the speed of light using using a rotating toothed wheel and a mirror. 2022-01-22, 1019🔥, 2💬
Reciprocity of Length Contraction
This section introduces the reciprocity of length contraction. Length of a moving object is shorter when measured by a stationary observer; and length of a stationary object is shorter when measured by a moving observer. 2021-01-31, 638🔥, 2💬
References Used in Notes on Physics
List of reference materials used in this book. 2020-07-02, 275🔥, 1💬
Reciprocity of Time Dilation
This section introduces the reciprocity of time dilation. Elapsed time of a moving clock is slower when measured by a stationary observer; and elapsed time of a stationary clock is slower when measured by a moving observer. 2020-06-26, 2261🔥, 3💬
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. 2018-03-21, 1203🔥, 2💬
Newton's Third Law of Motion
This section introduces Newton's Third Law of Motion - If a force is exerted by one object to another object, another force is simultaneously exerted by the second object to the first object with equal strength and opposite direction. 2017-11-28, 1664🔥, 1💬
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, 2371🔥, 2💬
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, 759🔥, 1💬
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, 1324🔥, 1💬
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