[Lex Computer & Tech Group/LCTG] earth rotation
palbin24 at yahoo.com
palbin24 at yahoo.com
Mon Jan 4 12:08:04 PST 2021
Now I know why I am more tired!
Peter
> On Jan 4, 2021, at 2:57 PM, Pearlman, Michael R. (Mike) <mpearlman at cfa.harvard.edu> wrote:
>
> Folks,
>
> A hundred years from now the day will be 2 millesec longer. This rate was
> computed using historical solar eclipses. If you know any really old folks,
> ask them if they have noticed a change.
>
> Happy New Year, Mike Pearlman
>
>
>
>> On Sun, Jan 3, 2021 at 5:40 PM john rudy <jjrudy1 at comcast.net> wrote:
>>
>> I sent it out because although the questions might be silly the answers
>> are usually fascinating
>>
>>
>>
>> John Rudy
>>
>> 781-861-0402
>>
>> 781-718-8334 (cell)
>>
>> <mailto:John.rudy at alum.mit.edu> John.rudy at alum.mit.edu
>>
>>
>>
>> 13 Hawthorne Lane
>>
>> Bedford, MA 01730-1047
>>
>>
>>
>>
>>
>> From: Michael Alexander <mna.ma at yahoo.com>
>> Sent: Sunday, January 3, 2021 5:37 PM
>> To: john rudy <jjrudy1 at comcast.net>; Lex Computer Group <
>> LCTG at lists.toku.us>
>> Subject: Re: [Lex Computer & Tech Group/LCTG] earth rotation
>>
>>
>>
>> The article is an interesting thought-curiosity. However, it doesn’t
>> address the foundational question: Why on earth [ :-) ] should the earth
>> start rotating faster??
>>
>>
>>
>> The earth’s rotation actually should be slowing down. Why? Because of
>> friction from tides (on land as well as water). Tidal friction acts as a
>> kind of brake (think of the friction from a bicycle brake slowing a
>> rotating bicycle wheel).
>>
>>
>>
>> Long-term (very long-term) earth’s rotation will slow so earth keeps the
>> same face opposite the moon, just as, today, the moon ‘shows’ one face to
>> the earth.
>>
>>
>>
>> – Mike Alexander
>>
>>
>>
>>
>> On Sunday, January 3, 2021, 3:08 PM, john rudy <jjrudy1 at comcast.net
>> <mailto:jjrudy1 at comcast.net> > wrote:
>>
>> https://www.popsci.com/earth-spin-faster/?utm_source=internal
>>
>> <https://www.popsci.com/earth-spin-faster/?utm_source=internal <
>> https://www.popsci.com/earth-spin-faster/?utm_source=internal&utm_medium=em>
>> &utm_medium=em
>>
>> ail&tp=i-1NGB-Et-SfO-1Du6yj-1c-grOD-1c-1DtdWU-l5XZOopE3C-2HKV3Q>
>>
>>
>> &utm_medium=email&tp=i-1NGB-Et-SfO-1Du6yj-1c-grOD-1c-1DtdWU-l5XZOopE3C-2HKV3
>>
>> Q
>>
>>
>>
>>
>>
>>
>>
>> Pretty interesting story on what happens if the earth's rotation speeds up
>>
>>
>>
>>
>>
>>
>>
>> John Rudy
>>
>>
>>
>> 781-861-0402
>>
>>
>>
>> 781-718-8334 (cell)
>>
>>
>>
>> John.rudy at alum.mit.edu <mailto:John.rudy at alum.mit.edu> <mailto:
>> John.rudy at alum.mit.edu <mailto:John.rudy at alum.mit.edu> >
>>
>>
>>
>>
>>
>>
>>
>> 13 Hawthorne Lane
>>
>>
>>
>> Bedford, MA 01730-1047
>>
>>
>>
>>
>>
>>
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>>
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