The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.

Its dimensions in SI base units are m·kg s-2.

OR; better yet: 1 Newton = 1kg x 1 m/sec² = 1 (N sec²/m) x 1 m/sec² = 1 N???

"Donald G. Shead" wrote:

The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.
[snip]

One newton is the average weight of one apple. Go ahead, get 100
random apples weigh them and take the average. A meter is the
slightly wrong length of a one-second pendulum.

We won't discuss the siemen because children might be listening in.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
"Quis custodiet ipsos custodes?" The Net!

In sci.physics, Donald G. Shead

wrote
on Sat, 28 Jun 2003 01:16:29 GMT
. com:
The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.

Its dimensions in SI base units are m·kg s-2.

OR; better yet: 1 Newton = 1kg x 1 m/sec² = 1 (N sec²/m) x 1 m/sec² = 1 N???


In your system

1 N = 2.20462 lb-m * 39.37 in / (1 s^2 * 32.174 lb-m/slug * 12 in/ft)
= .22481 lb-f. (The conversion factors are necessary because
1 slug * 1 ft/s/s = 1 lb-f, but 1 kg = 2.20462 lb-m and 1 slug
= 32.174 lb-m.)

HTH. HAND.

--
#191,
It's still legal to go .sigless.

In sci.physics, Uncle Al

wrote
on Fri, 27 Jun 2003 20:01:19 -0700
:
"Donald G. Shead" wrote:

The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.
[snip]

One newton is the average weight of one apple. Go ahead, get 100
random apples weigh them and take the average. A meter is the
slightly wrong length of a one-second pendulum.

We won't discuss the siemen because children might be listening in.


What's wrong with those guys on a boat, really? :-)

--
#191,
It's still legal to go .sigless.

Donald G. Shead ), in article . com , wrote:
The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.

Its dimensions in SI base units are m·kg s-2.

OR; better yet: 1 Newton = 1kg x 1 m/sec² = 1 (N sec²/m) x 1 m/sec² = 1 N???

Hmmm. I came here to argue that dynes are nonsensical units and
should therefore be avoided, mainly because I can't figure out whether
they're units of force or units of mass. The conversion rate is supposedly
0.00102 grams to the dyne, or .00001 joules/metre to the dyne. The author
of http://www.metric.fsworld.co.uk/siall.htm mentions that Newtons are
also joules per metre.

I can certainly see how force goes into pressure. This definition,
if it's accurate, means that pressure could be expressed in joules per
cubic metre. That's to say if a force on square metres (pressure) is
Newtons per square metre, and Newtons are Joules per metre, then pressure
is Joules per metre / metre squared, which simplifies to J/m^3. In a
heuristic mode of evidence, I'd say that as long as you maintain pressure,
then cubic metres of steam can transmit Joules at whatever rate you
release the steam.

But, is there any way in which these two definitions for the same
unit could result in a discrepancy?
_______
If it could be, it would be.
In case you've ever wondered what would happen if "Cold Fusion"
experiments COULD be duplicated, consider that they require deuterium
(which is expensive), and they would produce tritium. Assuming that you
would be allowed these ingredients of bomb fusion, either the experiment
can't be a very ROBUST source of energy, or after ten years SOMEONE would
hav stolen the pick-up truck of deuterium needed to power California for a
year -- allowing America to easily sign and meet or beat the Kyoto accord.

The motivation is clearly there, and for people much closer to nuclear
physics than I am. If it could be done, it would be done.

Uncle Al wrote in message ...
"Donald G. Shead" wrote:

The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.
[snip]

One newton is the average weight of one apple. Go ahead, get 100
random apples weigh them and take the average.

My grocery store doesn't carry random apples. They have lots of
varieties (red delicious, fuji, granny smith, ...), but not the random
apples.

Paul Cardinale

(Paul Cardinale) wrote in message . com...
Uncle Al wrote in message ...
"Donald G. Shead" wrote:

The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.
[snip]

One newton is the average weight of one apple. Go ahead, get 100
random apples weigh them and take the average.

My grocery store doesn't carry random apples. They have lots of
varieties (red delicious, fuji, granny smith, ...), but not the random
apples.

What does a grocery store have to do with it? Those newtons are not
legal units of weight there. You need to use kilograms (or, in the
United States, you can also use pounds, which are legally by
definition 0.45359237 kg exactly -- and for prepackaged apples, you
still need both the pounds and the kilograms on the label in the
U.S.). If Uncle Al is weighing his apples in newtons, it must
necessarily be for some other reason than buying and selling apples;
hard to imagine what it might be, but Uncle Al is known to do some
strange things.

BTW, the CGPM officially accepted the newton as the name of the MKS
unit of force in 1948, not in 1960--and this name was first used for
this unit back around 1904.

Gene Nygaard
http://ourworld.compuserve.com/homepages/Gene_Nygaard/

"Gene Nygaard" wrote in message
om...
(Paul Cardinale) wrote in message
. com...
Uncle Al wrote in message
...
"Donald G. Shead" wrote:

The newton was adopted by the General Conference on Weights and
Measures
(CGPM) in 1960. It is defined as the amount of force required to
accelerate
a one kilogram mass at a rate of one meter per second per second.
[snip]

You need to use kilograms (or, in the
United States, you can also use pounds, which are legally by
definition 0.45359237 kg exactly -- and for prepackaged apples, you
still need both the pounds and the kilograms on the label in the
U.S.). If Uncle Al is weighing his apples in newtons, it must
necessarily be for some other reason than buying and selling apples;
hard to imagine what it might be, but Uncle Al is known to do some
strange things.

BTW, the CGPM officially accepted the newton as the name of the MKS
unit of force in 1948, not in 1960--and this name was first used for
this unit back around 1904.

Picky-picky: Since it _was_ adopted as a unit of force: It must also be a
unit of weight! Whether or not it was said so, and Unk may well buy his
apples _legally_; by the newton.

Gene Nygaard

In sci.physics, ''

wrote
on Wed, 02 Jul 2003 09:15:06 GMT
uoxMa.1019$Fy1.62116@localhost:
Donald G. Shead ), in article
. com , wrote:
The newton was adopted by the General Conference on Weights and Measures
(CGPM) in 1960. It is defined as the amount of force required to accelerate
a one kilogram mass at a rate of one meter per second per second.

Its dimensions in SI base units are m·kg s-2.

OR; better yet: 1 Newton = 1kg x 1 m/sec² = 1 (N sec²/m) x 1 m/sec² = 1 N???

Hmmm. I came here to argue that dynes are nonsensical units and
should therefore be avoided, mainly because I can't figure out whether
they're units of force or units of mass. The conversion rate is supposedly
0.00102 grams to the dyne, or .00001 joules/metre to the dyne. The author
of http://www.metric.fsworld.co.uk/siall.htm mentions that Newtons are
also joules per metre.

Dynes are units of force in the cgs system, analogous to Newtons
in the MKS/SI system. 1 dyne = 1 g cm/s/s. 1 Newton = 1 kg m/s/s.


I can certainly see how force goes into pressure. This definition,
if it's accurate, means that pressure could be expressed in joules per
cubic metre.

That is possible, yes. It's slightly unusual. :-)

That's to say if a force on square metres (pressure) is
Newtons per square metre, and Newtons are Joules per metre,

Well, Joules (energy) = Newtons (force) x meters (distance).

then pressure
is Joules per metre / metre squared, which simplifies to J/m^3.
In a heuristic mode of evidence, I'd say that as long as you
maintain pressure, then cubic metres of steam can transmit Joules
at whatever rate you release the steam.

But, is there any way in which these two definitions for the same
unit could result in a discrepancy?
_______
If it could be, it would be.
In case you've ever wondered what would happen if "Cold Fusion"
experiments COULD be duplicated, consider that they require deuterium
(which is expensive), and they would produce tritium. Assuming that you
would be allowed these ingredients of bomb fusion, either the experiment
can't be a very ROBUST source of energy, or after ten years SOMEONE would
hav stolen the pick-up truck of deuterium needed to power California for a
year -- allowing America to easily sign and meet or beat the Kyoto accord.

The motivation is clearly there, and for people much closer to nuclear
physics than I am. If it could be done, it would be done.


--
#191,
It's still legal to go .sigless.

The Ghost In The Machine ), in article , wrote:
Hmmm. I came here to argue that dynes are nonsensical units and
should therefore be avoided, mainly because I can't figure out whether
they're units of force or units of mass. The conversion rate is supposedly
0.00102 grams to the dyne, or .00001 joules/metre to the dyne. The author
of http://www.metric.fsworld.co.uk/siall.htm mentions that Newtons are
also joules per metre.

Dynes are units of force in the cgs system, analogous to Newtons
in the MKS/SI system. 1 dyne = 1 g cm/s/s. 1 Newton = 1 kg m/s/s.

Then, despite the chart's listing of a conversion, they don't
convert to grams. (not that this chart is otherwise flawless, as it also
lists a conversion from kilograms/m/m to units of pressure and DOESN'T do
the same thing from Newtons/m/m).

What do CGS and MKS stand for?
_______
Ginsberg's Restatement of the Three Laws of Thermodynamics:
You can't win.
You can't break even.
You can't quit.