Question

(a) A unit of time sometimes used in microscopic physics is the shake. One shake equals 10^-8 s. Are there more shakes in a second than there are seconds in a year? (b) Humans have existed for about 10^6 years, whereas the universe is about 10^10 years old. If the age of the universe is defined as 1 “universe day,” where a universe day consists of “universe seconds” as a normal day consists of normal seconds, how many universe seconds have humans existed?

Answer 1

please answer b and show working

Answer 2

A universe day is 10^10 years, so a universe second is 10^10/(86400) human years, the number of seconds in a day. Thus humans have existed for
\[\large \frac{10^6}{\frac{10^{10}}{86400}}\]

Answer 3

You are a genius! The world the once again makes sense!