Recent content by bolahab

Yeah for this question i did a lot of work on it, but I am trying to see what i got is right, and if does match what i get from you guys

yes it is transformed into He-3, that was all the info from the question, but the rest info as it says in the book when it is transformed into He-3

Suppose the neutron decay time n was 89 sec. AND the difference in rest mass between neutron to proton, Qn, was 0.129 MeV. What would the maximum Helium fraction, Yp, be?

Why do we think there is a significant amount of Dark Matter in the universe? a) Descibe at least 3 independent situations which require Dark Matter to understand observations. b) Why don’t we think that Dark Matter is baryonic? c) What do we think is might be?

Thnx George that really helped, but can you please give more details ?

Yeah it can be expressed like that

Hey guys, can someone please help with this question. We now live in a time when the energy balance of the universe is dominated by Λ. A long time from now, at t2× the universe will have doubled in size, i.e.: a(t2×) = 2. At present, radiation is negligible: Ωr,0 ~ 0, and will remain so...