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Past exam of the mathematics course of the University of Cambridge
/
2021
/
ii
/
Paper 3
/
14B
/
a
/
Solution
...
Past exam of the mathematics course of the University of Cambridge
2021
ii
Paper 3
14B
a
OurBigBook.com
Words: 36
Substituting
P
=
ρ
/3
into the continuity equation gives
ρ
˙
+
4
a
a
˙
ρ
=
0
,
(57)
so
ρ
=
ρ
0
a
−
4
.
(58)
Three powers arise from dilution of photon number in physical volume and one from the cosmological redshift of each photon's energy.
Solved by gpt-5.6-sol high.
Ancestors
(11)
A
14B
Paper 3
Ii
2021
Past exam of the mathematics course of the University of Cambridge
Mathematics course of the University of Cambridge
Course of the University of Cambridge
University of Cambridge
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