could anyone please help me with this coursework,i am soo confused with maths,thanks(adsbygoogle = window.adsbygoogle || []).push({});

1)

Start with friedmann equation for case for flat universe k=0 with mass density total p =p(m) + p(cosmo constant). how can i derive integral relating scale factor to time in form

$f(a)da = $(8piG/3)^(1/2) where $=integral

then by using change of variable a to s

s = {(p(cos)/p(mo))x(a/a(o))^3}^(1/2)

and

Then another change of variable s to (THETA) = sinh^-1(s) should be able to calculate integral in A to obtain a relation for t = G(A) WHERE G(A) YOU DERIVE

where p(mo) is density matter at t =0 and a(o) is scale factor at time t=0

x=times

^3= to power of three

sinh(s)^-1 does not equal 1 /sinh(s)

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# Homework Help: Please Help Cosmology Friedmann

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