Which expression gives a simple estimate of the age of the univers? a)vr b)1/H c)Hr d) d/v?

Answer 1

Hi Nichole

The Hubble constant has units of distance/time/distance, which reduces to 1/time. Thus 1/H has units of time.

A value for H of 80km/s/MPc can be converted into an age for the universe by sorting out your units and then inverting:

* 80km/s/MPc
(multiply by the number of megaparsecs in 1km: 3.24*10^-20)
= 2.59*10^-18 s^-1
invert:
= 3.86*10^17seconds
convert to years:
= 12.2 billion years.


Hope this helps!
The Chicken

Answer 2

While I couldn't answer this myself, those who answered gizm099's EXACT SAME QUESTION just minutes before you might be of help.