Can we change history so that the present and future will be changed too? ]]>

If time is basically the measure of change, and if there is no energy then there is no change, would it be safe to assume that within a system absent of energy, Time wouldn't exist? (In this hypothetical scenario, there are no quantum fluctuations)

What are your thoughts?]]>

Motion Mountain Free Physics Textbook

Free for download in pdf.

Physics/Math References]]>

To be an inertial observer during some period of your life, do you have to be a PERPETUALLY inertial observer? I.e., is it required that you must NEVER have accelerated in the past, and that you can guarantee that you will NEVER accelerate in the future?

Or, can you be an inertial observer if it has been long...

When Does an Observer Become an Inertial Observer?]]>

1. Measure the tested object's length at rest, the value l0.

2. Put this object in motion.

3. Measure the object's speed, the value v.

4....

How to test length contraction by experiment?]]>

I'm New here on this forum.

My college and I have thought of a theory combining the forces of nature.

It can be downloaded at:

https://metric.science

Hope some of the public on this forum will want to put some effort in peer reviewing the article.

Thank in advance!]]>

Is Entropy , represented in math by S , the number of ways a system can change ?

If not , what it is ?

Thanks in advance .]]>

First, I wrote:

The MCMIFM (the Momentarily Co-Moving Inertial Frame Montage) is the uniquely true and meaningful reference frame for the accelerating observer, because it is the ONLY reference frame that agrees with the observations and first-principle calculations that he himself can make. [...] My CADO reference frame is completely equivalent to the MCMIF.

Then, I wrote:

I've given...

A Simple Example, and a Test]]>

Any one?]]>

What is the point of needless science that costs millions and is plain for all to see that it is a waste of time?

Who sanctions such rubbish science ?]]>

Okay, so recently I bought a ring online, and normally, I wear a size 5. Well, they were out of that size, so I purchased a 5.5. In looking at a ring size chart online, a size 5 ring is 15.6 mm but a 5.5 is 16.0

Just by eyeballing the two, it looks like it should be fine, but my question is how do you figure out the inside diameter of a ring?

(Edited, because I sorted out my original two-part question)]]>

There are two (or more) problems afflicting model yachts. To counteract the sideways torque of the wind in the sails requires a deep keel. A deep keel causes drag and launching a boat with a deep keel requires venturing into the water beyond wellington depth.

The design aim is to eliminate the deep keel.

Sooo.. we look at mounting a gyroscope with the rotating bit in the horizontal plane. With a single gyroscope...

Model yachts and gyroscopes]]>

Are atoms some form of cold fusion ?

Thanks in advance .]]>

Thanks in advance]]>

If that is so ,why are they called virtual photons ?

Do they "behave" in a photon- like way?]]>

"Accelerated Observers in Special Relativity", PHYSICS ESSAYS, December 1999, p629

I gave a proof that (in regards to the well-known twin "paradox"), the current age of the home twin (she), according to the traveler (he), as given by the CADO reference frame (which is completely equivalent to the better-known "co-moving inertial frames montage"), AGREES with what he can determine himself, using ONLY his own elementary observations, combined with his own elementary calculations....

Is Simultaneity "Real"?]]>

Is it possible these fields act as an aether for the propagating light ?

Thanks in advance.]]>

At the time, the redefinition of the kilogram got most of the press, but in fact several of the definitions have changed. This has some interesting implications.

Almost all of the base units are now defined by fixing the values of some fundamental physical constants.

Defined as exactly 9 192 631 770 oscillations in the frequency of the...

SI base units]]>