/sci/ - Science & Math

I have nice little thought experiment for you.

Suppose the gravitational constant G were to be suddenly dropped to G/4.

How would that affect our sun?
It's stellar evolution phases, formation, composition, life time, luminosity etc.

A little help /sci/.

An electron and a positron are moving towards each other and colliding. In the process a new particle is formed. Now, if the electron's momentum is p1, and the positron's momentum is p2, then their total energy is Et=p1*c+p2*c (assuming their rest masses are very small in comparison).
The new particle's mass should be Et/(c^2) = (p1+p2)/c.

Why is the answer 2*sqrt(p1*p2/c^2)?
This is driving me nuts.

If the Chandrasekhar limit is correct, then how come this object doesn't collapse unto itself?

http://www.youtube.com/watch?v=aSyo6nqBiRE

Checkmate, atheists.

This thread will now be hijacked by tripfags.