Calculating Age of the Universe with Redshift - Help Needed!

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To calculate the age of the universe at a specific redshift, such as 0.6, one must first determine the scale factor, which relates to the expansion of the universe. The current age of the universe is approximately 13.4 billion years, and understanding the relationship between age and scale factor is crucial for this calculation. The discussion suggests seeking assistance on specialized forums for more advanced physics queries. Overall, grasping the proportionality between age and scale factor is essential for accurate calculations of the universe's age at different redshifts. Engaging with knowledgeable communities can provide the necessary guidance for these complex calculations.
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Hi i am confused as to how to calculate the age of the universe with redshift
say for example

The age of the universe now is 13.4 billion years old (and a critical universe).
How do i find the age of the universe if it was a redshift at say 0.6??

Do i have to find the scale factor first?
I am not very sure, please help!
 
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I'm trying to find the proportionality relationship between age and scale factor to get current age... can someone please help me
 
Generally questions like yours or Kingfishers get better service on the advanced physics forum,...
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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