Whether they have mass or not. This not the
point. They have energy and that has gravity.

The question is: Can we determine how many
there actually are?

Anybody know results from experiments that set
a lower limit?

Nick wrote:
Whether they have mass or not. This not the
point. They have energy and that has gravity.

The question is: Can we determine how many
there actually are?

Anybody know results from experiments that set
a lower limit?

Gotta be more than five.

p

platopes wrote:
Nick wrote:
Whether they have mass or not. This not the
point. They have energy and that has gravity.

The question is: Can we determine how many
there actually are?

Anybody know results from experiments that set
a lower limit?

Gotta be more than five.

p

Funny platopes,

There are six types of neutrinos of which three
are the anti-neutrinos.

first of all
you already leaned from me that:

'no mass no real physics'!!

(even no energy!!)

2 i would prefer to think about them as composed of the Circlons

3 my guess is that it is impossible
to know how many of them


ATB
Y.Porat
--------------------------

Nick wrote:
Whether they have mass or not. This not the
point. They have energy and that has gravity.

Oh, but it is the point...and it is on the order of a few eV.

Not enough to tip the scales to make this universe collapse at any
rate.


The question is: Can we determine how many
there actually are?

We can guess. We know the reactions that took place as the universe
formed, and we know what was formed.


Anybody know results from experiments that set
a lower limit?

....on what? Neutrino mass?

By the way, WHICH neutrino? There are three of them.

Go forth and learn something for a change!

http://pdg.lbl.gov/2005/listings/lxxx.html
http://scholar.google.com

Nick wrote:
platopes wrote:
Nick wrote:
Whether they have mass or not. This not the
point. They have energy and that has gravity.

The question is: Can we determine how many
there actually are?

Anybody know results from experiments that set
a lower limit?

Gotta be more than five.

p

Funny platopes,

There are six types of neutrinos of which three
are the anti-neutrinos.

http://spaceflightnow.com/news/n0106/20sno/

"Even though there is an
enormous number of neutrinos in the universe, the mass limits
show that neutrinos make up only a small fraction of the total mass
and energy content of the universe," said Hamish Robertson of the
University of Washington. (end quote)

Lower limit: an enormous number.

p