Fundamentals Of Physics (6ºed)\chap01

Fundamentals Of Physics (6ºed)\chap01 - (b) Denoting the...

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12. The number of seconds in a year is 3 . 156 × 10 7 . This is listed in Appendix D and results from the product (365 . 25 day / y)(24 h / day)(60 min / h)(60 s / min) . (a) The number of shakes in a second is 10 8 ; therefore, there are indeed more shakes per second than there are seconds per year.
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Unformatted text preview: (b) Denoting the age of the universe as 1 u-day (or 86400 u-sec), then the time during which humans have existed is given by 10 6 10 10 = 10 − 4 u-day , which we may also express as ( 10 − 4 u-day ) µ 86400 u-sec 1 u-day ¶ = 8 . 6 u-sec ....
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