For a given value of Hubble's constant, how does the age of the ...

[serike]

For a given value of Hubble's constant, how does the age of the universe depend on the overall density of the universe?
 
  What will be an ideal response?

Question 2

What happens to the size and mass of an object as it moves faster?
 
  What will be an ideal response?

[Christopher]

Answer to Question 1

The higher the density, the younger is the universe. This is because Hubble's constant measures the expansion rate at present. If the density is high, then the expansion has slowed substantially with time and must have been much faster in the past. Faster expansion in the past means it took less time for the universe to reach its current size, so the universe would be younger.

Answer to Question 2

A faster object's mass increases and length increases.

[serike]

Thanks for the timely response, appreciate it

[zacnyjessica]

Gracias!