Sunday

January 25, 2015

January 25, 2015

Posted by **jake** on Sunday, October 4, 2009 at 9:57pm.

The Earth rotates every 24 hours (actually 23 hours, 56 minutes and 4 seconds) and has a diameter of 7926 miles. If you're standing on the equator, how fast are you traveling (how fast is the Earth spinning)? Compute this (a) using 24 hours and (b) then with 23 hours, 56 minutes, 4 seconds.

- Trig -
**Reiny**, Sunday, October 4, 2009 at 10:31pmCircumf. = 7926pi miles

a) if time = 24hrs

rate = 7926pi/24 mph

= appr. 1037.5 mph

b) 23:56:04 = 23.9333444 hrs.

(23 + 56/60 + 4/3600)

rate = 7926pi/23.9333444 = 1040.4 mph

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