How many top quark lifetimes have there been in the history of the universe (i. e., what is the age of the universe divided by the lifetime of a top quark) ? note that these powers of 10 follow the same rules that any exponents would follow?

Question

Kenya Best

Physics

30 August, 21:50

How many top quark lifetimes have there been in the history of the universe (i. e., what is the age of the universe divided by the lifetime of a top quark) ? note that these powers of 10 follow the same rules that any exponents would follow?

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Answers (1)

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Danielle Mcintyre · Answer 1

In order to solve this, we must know the life in years of the universe and a top quark in order to compare them. If you search in the internet, the age of the universe by order of magnitude is about 10²² seconds while a top quark (heaviest subatomic particle) is 10⁻¹⁸ seconds. Thus,

10²² years/10⁻¹⁸ = 10²²⁻⁻¹⁸ = 10⁴⁰

There would be a total of 10⁴⁰ top quark lifetimes over the age of the universe.