electron radius =1.498754637*10^-22 meters

i calculated the value of an electron radius and i got it has
1.498754637*10^-22 meters

"peter" schrieb im Newsbeitrag
om...
i calculated the value of an electron radius and i got it has
1.498754637*10^-22 meters

nice

rb

Rainer Borchmann (or somebody else of the same name) wrote in message
thusly:

"peter" schrieb im Newsbeitrag
om...
i calculated the value of an electron radius and i got it has
1.498754637*10^-22 meters

nice

rb

Now take it's spin angular momentum (h/4pi), turn that into an rpm and so
find the surface spin speed at the "equator". You'll find it's many times
greater than c.
--
Paul Townsend
I put it down there, and when I went back to it, there it was GONE!

Interchange the alphabetic elements to reply

Don't you mean "turn it into a speed"? Rotations per minute don't tell you
much about the velocity of something. Something 2m wide spinning at 1000 RPM
will have different parts of it moving at different speeds.

Now take it's spin angular momentum (h/4pi), turn that into an rpm and so
find the surface spin speed at the "equator". You'll find it's many times
greater than c.
--
Paul Townsend
I put it down there, and when I went back to it, there it was GONE!

Interchange the alphabetic elements to reply


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(peter) wrote in message . com...
i calculated the value of an electron radius and i got it has
1.498754637*10^-22 meters

Wrong...

Aladar
http://stolmarphysics.com

"Alexander Whiteside" wrote in message
...
Don't you mean "turn it into a speed"? Rotations per minute don't tell you
much about the velocity of something. Something 2m wide spinning at 1000 RPM
will have different parts of it moving at different speeds.


The OP proposed a value for the radius of the electron.
Presumably he also implied that the electron is a
spherical particle.

The intrinsic angular momentum of the electron is known
to be L = h/(4pi), or about 5.27x10^-35 kg-m^2/sec.

The moment of inertia of a uniform sphere of mass M and
radius r spinning about an axis is

I = (2/5)M*r^2

For the electron with mass M = 9.11x10^-31 kg and the
OP's radius, this yields I = 8.19x10^-75 kg-m^2.

If w is the angular velocity of the rotating sphere, then
we have the angular momentum L:

L = I*w

so that w = L/I and the tangential velocity at the equator
of the sphere is v = rxw.

w = L/I = 6.44x10^39 Hz

rxw = 9.66x10^17 m/sec

That's waaay faster than light.

Alexander Whiteside (or somebody else of the same name) wrote in message
thusly:

Don't you mean "turn it into a speed"? Rotations per minute don't tell you
much about the velocity of something. Something 2m wide spinning at 1000
RPM will have different parts of it moving at different speeds.

No, I asked for the speed at the *surface* at the *equator*. That is a
single unique figure for a given spinning sphere, e.g. just over 1000 mph
for the Earth.

Now take it's spin angular momentum (h/4pi), turn that into an rpm and so
find the surface spin speed at the "equator". You'll find it's many times
greater than c.

--
Paul Townsend
I put it down there, and when I went back to it, there it was GONE!

Interchange the alphabetic elements to reply

My fault, misread the question...

Of course, spin has nothing to do with actual movement on those scales, and
is more similar to a symmetry function. For example, a king in a deck of
playing cards has a spin of 2, and a sphere has a spin of infinity. Or
something like that, I forget.


"Prai Jei" wrote in message
...
Alexander Whiteside (or somebody else of the same name) wrote in message
thusly:

Don't you mean "turn it into a speed"? Rotations per minute don't tell
you
much about the velocity of something. Something 2m wide spinning at 1000
RPM will have different parts of it moving at different speeds.

No, I asked for the speed at the *surface* at the *equator*. That is a
single unique figure for a given spinning sphere, e.g. just over 1000 mph
for the Earth.

Now take it's spin angular momentum (h/4pi), turn that into an rpm and
so
find the surface spin speed at the "equator". You'll find it's many
times
greater than c.

--
Paul Townsend
I put it down there, and when I went back to it, there it was GONE!

Interchange the alphabetic elements to reply