On Saturday 05 March 2016 08:11:46 Oscar Benjamin wrote:
> On 5 March 2016 at 02:51, Gregory Ewing
wrote:
> > The masslessness of photons comes from an extrapolation
> >
> >> that leads to a divide by infinity: strictly speaking it's just
> >> undefined.
> >
> >
On 5 March 2016 at 02:51, Gregory Ewing wrote:
> The masslessness of photons comes from an extrapolation
>>
>> that leads to a divide by infinity: strictly speaking it's just
>> undefined.
>
> No, it's not. The total energy of a particle is given by
>
>E**2 ==
Chris Angelico :
> On Sat, Mar 5, 2016 at 1:51 PM, Gregory Ewing
> wrote:
>> Conservation of energy would be one reason. If you put two particles
>> together and got more energy out than went in, where did the extra
>> energy come from?
>
> You
On Sat, Mar 5, 2016 at 1:51 PM, Gregory Ewing
wrote:
> Conservation of energy would be one reason. If you
> put two particles together and got more energy out than
> went in, where did the extra energy come from?
You borrowed it from the bank, of course. You have to
Oscar Benjamin wrote:
If we want to be precise then
it's pointless to even refer to the "rest mass" of something that is
never at rest.
Which just shows that the term "rest mass" is a bit silly.
It came from some confused thinking very early in the
development of relativity. The physicists
This discussion about energy and masses of particles has nothing to do with
Python, and I am hoping that it will be dropped. That being said, I feel
compelled to correct what are completely wrong statements.
On Friday, 4 March 2016 13:36:11 UTC-4, Oscar Benjamin wrote:
> On 4 March 2016 at
On 4 March 2016 at 10:38, Marko Rauhamaa wrote:
> Oscar Benjamin :
>
>> The mass is carried by the new particles. The new particles may have a
>> total *rest mass* which differs from the total rest mass of the
>> previous particles. However the total
On Fri, 04 Mar 2016 12:38:28 +0200, Marko Rauhamaa wrote:
> As for the existence of a negative mass, it is interesting to note
> that the (rest) mass of an alpha particle is less than the sum of the
> (rest) masses of its constituents. About 1% of the mass is "missing."
Oscar Benjamin :
> The mass is carried by the new particles. The new particles may have a
> total *rest mass* which differs from the total rest mass of the
> previous particles. However the total mass is the rest mass plus the
> mass associated with the "kinetic
On 4 March 2016 at 00:04, Steven D'Aprano wrote:
> On Fri, 4 Mar 2016 07:20 am, alister wrote:
>
>> On Thu, 03 Mar 2016 11:03:55 -0700, Ian Kelly wrote:
>
>>> Antimatter has positive mass.
>>
>> Are you sure?
>> mix 1 atom of hydrogen + 1 of anti hydrogen & you end up with 0
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