/sci/ - Science & Math

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define "time"

>>5804587
The t in d=rt and is generally measured in seconds, minutes, hours, days, months, years, decades, etc.

Time isn't a thing. Time is what is used to describe change.

Sure. It's called "energy."

This is a trivial result of special relativity - we deal with four-vectors (vectors with four component, three spacial and one temporal). Four-momentum is defined as:

<div class="math"> p_\mu =(E/c,p_x ,p_y ,p_z)</div>

where:

<span class="math">E=\gamma mc^2[/spoiler]

<span class="math">p_x=\gamma mv_x[/spoiler]
etc. for the y and z components, and:

<div class="math">\gamma =\frac{1}{\sqrt{1-( v_x^{~2} + v_y^{~2} + v_z^{~2})/c^2}}</div>
Given the numerous relationships between time/energy and space/momentum, this shouldn't be too surprising. For example, conservation of energy is a consequence of time translation symmetry, while conservation of momentum is a consequence of spacial translation symmetry.

>>5804622
Time is the distance between events in the same space.

>>5804622
For some reason this shit seems to be rampant on /sci/. Whenever I see a thread about time, I inevitably see a post about how time doesn't "really" exist, and how it's "actually" [ill-defined nonsense].

>>5804639
/thread

Ask if you have any further questions.