Welcome to our forum. A Message To Our New and Prospective Members . Check out our Forum Rules. Lets keep this forum an enjoyable place to visit.
Currently working on errors from the latest (SimplePress) forum update. Many issues have been resoled and others are being worked on. Thank you for your patience.
Log In
Register
Topic RSS
(0 votes) 
Regulars
Offline
I just completed “Newton and the Counterfeiter” by Thomas Levenson. I do not know if the book is available on audiobook, but it would be a good book to enjoy on a trip.
Circa 1660, Newton undoubtedly knew how fast the earth was resolving around the poles (the Greeks likely also figured it out 1k years before that). But do your kids (and you) know?
The calculation is simple. The radius of the earth at the equator is 3,963 miles. The circumference of a circle is expressed as 2 x pi x radius or (2 x 3.14 x 3,963 miles). The earth revolves once per day, and a day has 24 hours). The answer should be in the form of miles/hr.
I doubt that few people today could guess something even close to the answer.
Success is the progressive realisation of a worthy ideal. —Earl Nightingale.
Offline
1,036.985 ? I did not use a calculator, so give me a few mph’s for a senior moment here and there. 🤣😂🤣😂
Learn Violin and Fiddle
on
Fiddlerman's Fiddle Talk Forum
Offline
Regulars
Offline
@Mouse and others. 1k miles per hour works for me (only social scientists carry estimates out three places after the decimal point). No wonder the church was burning these guys up back in the day.
Success is the progressive realisation of a worthy ideal. —Earl Nightingale.
1 Guest(s)
