It is worthless.

The animal bodies are regulated by the 24h system.

And it would be necessary to redefine the reference second which is now
related to the cesiuaam atom.It is the international reference like the
meter also related to this atom



rickman a écrit :
Someone was talking about decimal time where the second is shortened by
about 15% allowing 100 secs/minute, 100 minutes/hr, 10 hr/day.

I think the utility of this is limited and it would cause a lot of
changes in society. We presently have a large number of convenient time
increments which would not be so convenient in the new system.

First, the hour would be 2.4 times longer leaving us with no convenient
unit about the same length of time as the hour. The closest would be
the quad-deci-hour which would be 0.96 old hours. The deci-hour would
be pretty convenient about 4% shorter than a quarter hour. The old half
hour would now be about a fifth of a new hour, so we could call it a
"fifth" which might become confused with a non-metric liquor measure, a
fifth of a gallon which has since become 750 ml in metric.

The inconvenience would come from the need to totally recalibrate every
type of measurement we use that considers time... speed limits, work
days, time zones... Would we extend this change to measurements of
angles which often are done in degrees, minutes, seconds?

How would we adjust the work day? Do we go to 3 hour work days which
would be about 7.2 old hours? Shift work would have to split hours to
get three shifts while some businesses that use two 12 old hour shifts
would hum along just fine with 5 new hour shifts. Many businesses
opening at 9 AM would now open at 4:00 (I assume we would just count 0
to 9 hours rather than the annoying AM/PM thing), folks would take a
lunch break at 5:00 and banks would close around 6:00 while retail would
remain open until 9:00 or 9:50 (hmmm, that is still about the same).

The minutes gets pretty whacked gaining 26.4 old seconds. So "give me a
minute" becomes a quarter more weighty of a request. The original pulse
was conceived to match the human pulse so our normal pulse rate will
become 86 bpm instead of 60 bpm.

In science the changes would be enormous. With a redefinition of the
second every time related measurement would have to change including
many in EE such as capacitance/charge/current, heck, the definition of
the gravitational constant and even the speed of light would have to
change. Every text book would change and every instrument. This would
create so much confusion that we really would need new names for the
second, minute and hour.

This could go on all day (the one measurement that doesn't change) with
a huge list of changes we will have to make and the many adaptations we
as a society would need to accommodate. Then, in the end, we would
still have leap years.