Головна

Завдання № 1.

  1. Атестація робочих місць за умовами праці. Мета, основні завдання та зміст атестації. Організація робіт та порядок проведення атестації робочих місць. Карта умов праці.
  2. Б.1 - вихідні дані до завдання 2
  3. Варіанти формул для завдання №1
  4. Визначте пункти, ЩО НЕ відноситься до завдання
  5. Визначте пункти, ЩО НЕ відносяться до завдання
  6. Визначте пункти, ЩО НЕ відносяться до завдання
  7. Визначте пункти, ЩО НЕ відносяться до завдання.

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ORIGINE OF THE METRIC SYSTEM

The metric or decimal system is the international system of measures and weights based on the metre and the kilogramme. That this system should be universally adopted is recognized by all the countries of the world except England and America. But even there scientists agree upon its being helpful and convenient and use this system preferably to that of their countries.

It is so simple that anybody who can multiply by ten can learn it in a very short time. A simple relationship exists between the units of mass, length and so on, each unit being a multiple of the next lower unit by ten. Therefore, the reduction of a quantity to a higher, or a lower one is effected by simply moving the decimal point to the left or right to the number of places required.

Previously to the introduction of the metric system, the term "foot" and "pound" that were used for hundreds of different weights and lengths, caused serious difficulties in the commercial relations among various countries.

The idea of securing a uniform system of measures and weights dates from long ago, but it was only at the close of the 18th century that it was realized. In 1791 a commission set up by the French Academy of Science recommended that the standard of length should be one ten-millionth part of the distance from the Earth's Equator to the North Pole measured along the meridian. Two French mathematicians that were appointed for the purpose, took greatest pains for measuring the distance along the meridian from Dunkirk (France) to Barcelone (Spain).

Then a commission consisting of representatives of various European countries undertook the final work - that of deducting the length of the new unit, and deriving variuos units from it.

A rod made of iridio-platinum, of a length equal to that of one ten-millionth part of the distance from the Equator to the North Pole, was constructed in 1794, becoming the Standard Metre.

At the same time the unit of mass was defined as the mass of a cubic centimetre of pure water at the temperature of maximum density (4 C) and given the name of gramme. A platinum cylinder known as the kilogramme was made and declared to be the standart for 1000 grammes.



Завдання № 5. | Завдання № 5.

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