/sci/ - Science & Math

This was the other thread's premise.

Is /sci/ even awake? I see the same threads as I did days ago.

No.
Nuclear decay rates are a constant like the speed of light; they are directly related through Maxwell's equations. This is why we can prove Einstein's theories by sticking a nuclear clock on a jet.

>>1803409
So if the end of the rod approached the speed of light (if you accelerated the rod's rotation) what would happen? I heard that its time would slow down, or speed up, or something, so that it didn't move faster than the speed of light... which would affect its radiation, would it not?

I'm not talking about it transferring momentum to decay or any bullshit like that. I heard about time dilation, which should affect radiation directly if radiation is time-based.

>>1803422
because the ends are traveling faster time slows down for it this means that it will decay slower at its ends than in the middle

>>1803422
If you're on a space ship travelling close to the speed of light radioactive materials in your pocket and back on Earth will both appear to decay faster from your perspective. To anyone standing on Earth the radiative materiel in your pocket isn't decaying any slower. Time is relative; decay rates are not.

>>1803428
All right, that's what I thought. What about the perceived shape of the rod? It could be iron, or whatever, it doesn't matter... if the ends move slower than the predicted speed (predicted: v>c, real: v<c) then would the rod curve and look like a spiral or something?

I'm not a physicist or anything but this is how I see it. It's angular momentum is 0.99c and is constant along the rod, therefore its linear velocity is not constant along the rod and so the Radon or whatever is moving at different speeds when it is at different places along the rod. Now, this means that the relativistic effects on the particle would be different depending on the speed at the place you put it. One of those effects is time dilation and for the decaying thingy spinning around time is moving slower as it is moving faster (velocity-wise) and so it will decay slower when it is further towards the end of the rod.

>>1803437
no. just, no
decay rates depend on the relative speed between the observer and the decaying particle

B... bump?

>>1803442
if v>c (which is impossible) it will bend or snap. if v = 0.99c then the ends will seem thinner because of Lorentz contraction like in the pic. in fact if you have a disk and spin it real fast the the relation (circumference) = 2*pi*(radius) does not hold (that is how Einstein discover curved space time)