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Simple Homework Problem to Blow Kid’s Mind
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Irv
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July 15, 2020 - 12:59 pm
Member Since: December 23, 2017
Forum Posts: 1508
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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.

Without deviation from the norm, progress is not possible.         —Frank Zappa

It is unpleasant to be thought so uncleverly unclean and capable of poisoning a whole city.—Sir Walter Scott

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cid
July 15, 2020 - 1:21 pm
Member Since: December 26, 2018
Forum Posts: 2100
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1,036.985 ? I did not use a calculator, so give me a few mph’s for a senior moment here and there. 🤣😂🤣😂

Viola Time! 

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BillyG
Brora, North-east Scotland
July 15, 2020 - 2:09 pm
Member Since: March 22, 2014
Forum Posts: 3438
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LOLOL, good old, fun stuff.   ( as for the rotational speed, well, they didn't specify their latitude at the time of recording... )

I seriously recommend not copying my mistakes. D'oh - guntohead.JPG

Please make your own, different mistakes, and help us all learn :-)

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Irv
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July 15, 2020 - 4:00 pm
Member Since: December 23, 2017
Forum Posts: 1508
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@cid 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.

Without deviation from the norm, progress is not possible.         —Frank Zappa

It is unpleasant to be thought so uncleverly unclean and capable of poisoning a whole city.—Sir Walter Scott

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