1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
satela [25.4K]
3 years ago
14

Write a summary on the history of the metric system in America.

English
1 answer:
Julli [10]3 years ago
7 0

Answer:

The history of the metric system began in the Age of Enlightenment with notions of length and weight taken from natural ones, and decimal multiples and fractions of them. The system became the standard of France and Europe in half a century. Other dimensions with unity ratios[Note 1] were added, and it went on to be adopted by the world.

The first practical realisation of the metric system came in 1799, during the French Revolution, when the existing system of measures, which had become impractical for trade, was replaced by a decimal system based on the kilogram and the metre. The basic units were taken from the natural world: the unit of length, the metre, was based on the dimensions of the Earth, and the unit of mass, the kilogram, was based on the mass of water having a volume of one litre or a cubic decimetre. Reference copies for both units were manufactured in platinum and remained the standards of measure for the next 90 years. After a period of reversion to the mesures usuelles due to unpopularity of the metric system, the metrication of France as well as much of Europe was complete by mid-century.

In the middle of the 19th century, James Clerk Maxwell put forward the concept of a coherent system where a small number of units of measure were defined as base units, and all other units of measure, called derived units, were defined in terms of the base units. Maxwell proposed three base units: length, mass and time. Advances in electromagnetism in the 19th century necessitated new units to be defined, and multiple incompatible systems of such units came into usage; none could be reconciled with the existing system of mechanical units. This impasse was resolved by Giovanni Giorgi, who in 1901 proved that a coherent system that incorporated electromagnetic units had to have an electromagnetic unit as a fourth base unit.

The seminal 1875 Treaty of the Metre resulted in the fashioning and distribution of metre and kilogram artefacts, the standards of the future coherent system that became the SI, and the creation of an international body Conférence générale des poids et mesures or CGPM to oversee systems of weights and measures based on them.

In 1960, the CGPM launched the International System of Units (in French the Système international d'unités or SI) which had six "base units": the metre, kilogram, second, ampere, degree Kelvin (subsequently renamed the "kelvin") and candela; as well as 16 further units derived from the base units. A seventh base unit, the mole, and six additional derived units were added in succeeding years through the close of the twentieth century. During this period, the metre was redefined in terms of the speed of light, and the second was redefined in terms of the microwave frequency of a cesium atomic clock. Since the end of the 20th century, an effort has been undertaken to redefine the ampere, kilogram, mole and kelvin in terms of invariant constants of physics.

Explanation:

The metric system was and still is a very important part of how things are created, and therefor built.

You might be interested in
12. Compare and contrast Justine and Elizabeth. How are they alike? How are they different?
cestrela7 [59]

Answer:

i can't contrast or compare if i have nothing to read off of

Explanation:

6 0
3 years ago
What is the connotative meaning of the word smart as used in this sentence from "An Hour with Abuelo"?
nlexa [21]

Answer:

It is clever and can you help me with a question

6 0
3 years ago
Read 2 more answers
Why does Percy try to keep a low profile on the train
Luda [366]
Try not to ask for AR questions here but the answer is because he doesn't want the furies and other demons to know where he is
8 0
3 years ago
I WILL GIVE BRAINALIST IF CORRECT!
Yuki888 [10]
The boxed words are a compound subject.

In a sentence talking about people, the people are subjects of that sentence. Subjects are basically what is being talked about.

Because there are two people being talked about, Bob and Al, the subjects are counted as one, or compounded. This just means that you read the sentence as [Bob and Al] instead of [Bob] and Al.

Compound verbs follow the same concept, but for action words. For example, “to sing and to dance”. However, in this case since the boxed words are subjects, they are a compound subject.
4 0
2 years ago
Q1. You have learnt how to infer character traits based on evidence from the text. Choose a character (other than Kara) from Whi
Leona [35]

Answer:

Scrooge in dickens' A Christmas Carol i miserly an greedy

Explanation:

He is so cheap that he won't allow his clerk to put another coal on the fire even though the room is freezing.It is Christmastime and several men visit Scrogs's office to collect money to buy food for a feast for the poor. Scrooge angrily refuses and throws the men out of his office.

3 0
3 years ago
Other questions:
  • What is the best example of context when giving a speech?
    5·1 answer
  • Which is one of the three animals that blocks Dante's path when he first wakes up in the forest? A. A vulture B. A wolf C. A pan
    8·2 answers
  • Wheatley uses the word free in these lines to suggest that
    15·1 answer
  • In The Garden (764), why is it unlikely that the woman will find happiness?
    14·1 answer
  • Which of the following would be the best source of information to compare the populations
    7·1 answer
  • How is the US in a political Golden Age right now? I know it's a difficult topic currently but I need to answer and give evidenc
    9·1 answer
  • Question 5 (1 point)
    10·1 answer
  • Fallen leaves and dry leaves can be buried in a compost pit true or false?
    7·2 answers
  • Choose the meaning of the word in parentheses. After a long day of sunshine, all the puddles in the street had ( evaporated ) in
    7·1 answer
  • What is the relationship between the poem's structure (stanzas and rhyme scheme) and its meaning? How does the structure organiz
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!