What is the fourth variable in the 4th dimension?

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The fourth variable in the fourth dimension is often considered to be time, particularly in the context of spacetime, represented by coordinates (t,x,y,z). The discussion highlights the relevance of Special Relativity, which addresses concepts like time dilation and its implications for understanding other dimensions. Practical applications, such as GPS technology, rely on Einstein's equations to account for time dilation effects caused by the relative speeds of satellites and Earth. Understanding these concepts can enhance comprehension of the relationship between relative and absolute measurements in physics. The exploration of these theories is deemed both fascinating and accessible.
Luongo
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is it time? what's your theory on the study of other dimensions? and applications from them?
 
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Almost without exception, when people talk about a 4D they mean spacetime, which has coordinates (t,x,y,z) for example. So yes, time would be the extra coordinate.
 
Luongo said:
is it time? what's your theory on the study of other dimensions? and applications from them?

If I've interpreted your question correctly, the theory would probably be Special Relativity that deals with time-dilation and space time.

For applications, the GPS which makes use of satellites will need to use Eintein's equation in order for it to work accurately. (relative speed between a point on surface of Earth and satellite's speed will cause time dilation which affects calculation of the coordinates)

Read up on the theory, very interesting and not that hard once you see the contrast between the terms "relative" and "absolute".

Sorry if I've misinterpretted your question haha =D
 

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