On Tue, 26 Apr 2016 01:51:52 +0100, "Tuesday"
wrote:

Those teachers could call heavy ton and light ton. I don't understand why
experts call 1000 kg metric ton just because meter is a unit that measures
lenght.

The metric system is an internationally agreed decimal system of
measurement. It was originally based on the mètre des Archives and the
kilogramme des Archives introduced by the First French Republic in
1799, but over the years the definitions of the metre and the kilogram
have been refined, and the metric system has been extended to
incorporate many more units. Although a number of variants of the
metric system emerged in the late nineteenth and early twentieth
centuries, the term is now often used as a synonym for the
"International System of Units"—the official system of measurement in
almost every country in the world.

The metric system has been officially sanctioned for use in the United
States since 1866, but the US remains the only industrialised country
that has not adopted the metric system as its official system of
measurement. Many sources also cite Liberia and Myanmar as the only
other countries not to have done so. Although the United Kingdom uses
the metric system for most administrative and trade purposes, Imperial
units are permitted or obligatory for some purposes, such as road
signs.


"Monty" escreveu na mensagem
.. .

On Sun, 10 Apr 2016 22:44:30 +0100, "Blue Citizen"
wrote:

Just curious about the history that lead to these differences between short
and long ton. Thought American ton was greater than Great Britain's one.

"Wolf K" escreveu na mensagem ...

On 2016-04-02 23:05, Blue Citizen wrote:
Hello you, today I was trying unit conversion with Windows Calculator and
now it looks different. Can't find Newton unit, plus it shows new units
I've
never seen before, Tonne for example, do you know this unit?

1,000kg, aka as "metric ton" for them as can't spell. English "ton" is
2,000lb. "Long ton" is 2,200lb, or approximately 999kg.

I can't agree with your definitions of English ton (2,000lb) and Long
ton (2,200lb).

The description below is from Encyclopedia Britannica and reflects
what I learnt in school about 70 years ago.

" Ton, unit of weight in the avoirdupois system equal to 2,000 pounds
(907.18 kg) in the United States (the short ton) and 2,240 pounds
(1,016.05 kg) in Britain (the long ton). The metric ton used in
most other countries is 1,000 kg, equivalent to 2,204.6 pounds
avoirdupois.

Ton came to mean any large weight, until it was standardized at 20
hundredweight although the total weight could be 2,000, 2,160,
2,240, or 2,400 pounds (from 907.18 to 1088.62 kg) depending on
whether the corresponding hundredweight contained 100, 108, 112, or
120 pounds."

I am not aware of any "ton" being defined as 2,200lb.

The best conversion resource is a little book I got 60 years ago as 1st
year engineering student. Don't need no built-in stuff, just a plain
calculator and the ability to turn paper pages and read 'em.

:-)

Hope you can help me.

Thanks,

You're welcome.

--
Blue Citizen