Bill, sir:
.....results is (metres per square second).....
I may not right being 'off topic'. It may not be right to call *metres per
square second* BUT referred to as: 'metres per second squared' or likewise '
'metres per second cubed', where needed.
I have missed the *tog issue*, while moving from India. I recall having
recently commented on 10*10^2 to be called the Metric Acre. The Metric Acre,
if needed could be : the area of a square field whose arm is *pi times 10*.
Knowing , Pi as an approximation to sqrt 10 the area in of Metric Acre =
1000 m^2 is (999.999...99977 in close proximity).
Regards,
Brij Bhushan Vij
(Tuesday - Kali 5106-W38-02)/D-005(Thursday, 2005 January 05H17:61 (decimal)
ET
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From: Bill Hooper <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: "U.S. Metric Association" <[email protected]>
Subject: [USMA:35575] Re: What's a good name for ten togs?
Date: Thu, 5 Jan 2006 15:33:36 -0500
On 2006 Jan 5 , at 1:04 PM, Pierre Abbat wrote:
Someone please explain what a cubic second is!
Why don't you ask what a square second is? That's even more common that a
cubic second.
A cubic second is what you get when you multiply three times (in seconds)
together. It is seldom (never?) encountered by itself and therefore
probably does not have any physically discernible meaning by itself.
The simplest example of its use that I know of is in the measurement of
rate of change of acceleration* (the derivative of acceleration, in
calculus terminology).
Acceleration is measured in metres per square second (which most people to
call "metres per second squared") with the symbol m/s^2**. The rate of
change of acceleration* is the change in acceleration divided by the time.
So the unit that results is (metres per square second) divided by
(seconds) which yields metres per cubic second (or, if you prefer, "metres
per second cubed") and has the SI symbol m/s^3**.
Regards,
Bill Hooper
Fernandina Beach, Florida, USA
*Rate of change of acceleration has been named "jerk", but I'm nor sure
how official that name is. So "jerk" is measured in m/s^3.
** The proper SI symbols use a superscripted 2 or 3. I have used the caret
mark, ^2 and ^3, since I am unable to reliably produce a superscript that
is interpreted properly by other people's computers.
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SIMPLIFICATION begins with SI
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