(a) A unit of time sometimes used in microscopic physics is the shake. One shake equals 108 s. Are there more shakes in a second than there are seconds in a year? (b) Humans have existed for about 106 years, whereas the universe is about 1010 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?
(a) A unit of time sometimes used in microscopic physics is the shake. One shake equals 108 s. Are there more shakes in a second than there are seconds in a year? (b) Humans have existed for about 106 years, whereas the universe is about 1010 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?
Astronomy
1st Edition
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Chapter19: Celestial Distances
Section: Chapter Questions
Problem 7E: While a meter is the fundamental unit of length, most distances traveled by humans are measured in...
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(a) A unit of time sometimes used in microscopic physics is
the shake. One shake equals 108 s. Are there more shakes in a
second than there are seconds in a year? (b) Humans have existed
for about 106 years, whereas the universe is about 1010 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?
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