A second does not sound very long, but by the time you have read this sentence, almost five of them will have gone by.Watch an average-length film and more than 5,000 seconds will tick away,In a lifetime of 80 years there are more than 2.5 billion seconds - but you will spend more than 800 million of them asleep!
Period Seconds
1 minute 60
1 hour 3,600
1 day 86,400
1 week 604,800
1 year 31,536,000
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