Relativity

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Open Is there a limit to time dilation other than infinity
A time dilation from special theory of relativity is known to equal to infinity when the relative velocity equals c from the transformations that are ... [more]

A time dilation from special theory of relativity is known to equal to infinity when the relative velocity equals c from the transformations that are derived from the special relativity. But is this agree with the non infinite time age of universe?

By Sadeem Fadhil · Al-Nahrain University

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6 The Theory of Reference Frames (TR)
By Daniele Sasso · ARS Independent Institute

Sadeem Fadhil · Al-Nahrain University

Thank you for your answer

Thank you for your answer

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8 Why is the pressure P in the Friedmann cosmological model negative to account for the accelerated expansion of the universe?
By Nathalie Olivi-Tran · French National Centre for Scientific Research

Pierre Amiot · University Laval

I will not attempt to answer all of your questions, only the one about the relationship between force and pressure in a 3D space. In that space, a for... [more]

I will not attempt to answer all of your questions, only the one about the relationship between force and pressure in a 3D space. In that space, a force is a vector (3 components) with a direction. Perpendicular to that direction, there is a plane that is a 2D entity and it is the surface on which acts the force. This is the surface that appears in the definition of the pressure. A pressure is measured on a surface and is due only to forces normal (perpendicular) to that surface. People, please do not bring Bernouilli's principle in this discussion, because it is a kinematic effect.

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6 Why don't Maxwell’s Equations, unlike Newton's Second Law, follow on from Galileo's Transformation?
By Ehsan Talebian · Tarbiat Modares University

Anatolij Prykarpatski · AGH University of Science and Technology in Kraków

Dear Ehsan, thank too! If you have any quetions and remarks, please do not hesitate to be in touch. Regards.

Dear Ehsan, thank too! If you have any quetions and remarks, please do not hesitate to be in touch. Regards.

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4 Lorentz Invariance(LT) of Maxwell's Equations(ME)
By Shu-Ch'ang Chang · Shanghai Jiao Tong University

Alberto Vecchiato · National Institute of Astrophysics

You can read this interesting paper. On the Galilean non-invariance of classical electromagnetism Giovanni Preti, Fernando de Felice and Luca Masiero ... [more]

You can read this interesting paper. On the Galilean non-invariance of classical electromagnetism Giovanni Preti, Fernando de Felice and Luca Masiero http://iopscience.iop.org/0143-0807/30/2/017/

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