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brilliants [131]
3 years ago
10

Who is attributed with coming up with the most influential scientific innovation of the 18th and 19th centuries

History
2 answers:
serg [7]3 years ago
8 0

Answer:

James Watt

Explanation:

James Watt is a Scottish inventor and innovator, lived between January 1736 and August 1819, as a mechanical engineer and a chemist, he worked on Thomas Newcomen's 1712 Newcomen steam engine with his Watt steam engine in 1776.

The innovation was intrumental to the changes brought by the Industrial Revolution in both Great Britain, his native country, and the rest of the world.

Therefore, he is credited with the most influential scientific innovation of the 18th and 19th centuries, due to his development of a steam engine that was efficient enough to power any machine during the period.

He is also credited for the development of concept of horsepower and the SI unit of power, the watt, which was named after him.

Alex Ar [27]3 years ago
6 0

The physical, natural and human sciences experienced the same impulse as technique and industry. In physics, experiences were made with light and electricity. In 1903 Ernest Rutherford discovered the radioactive elements and years later he devised a model of the atom. In 1895, Guillermo Róngten discovered X-rays.

In 1905, <u><em>Alberto Einstein</em></u> based on his mathematical studies revolutionized the conception of the cosmos with his Theory of Relativity, starting point of new investigations. This discovery meant a huge advance in science, comparable to those made by Copernicus, Kepler and Newton.

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A carpenter purchased 70 ft of redwood and 80 ft of pine for a total cost of $351. A second purchase, at the same prices, includ
notsponge [240]

Hey there!!


Let us take the cost of 1 feet redwood as ' x '


Let us take the cost of 1 feet pine as ' y '


For the first scenario :


70 ft red wood and 80 ft pine


1 feet redwood - $x


70 feet redwood - $70x


1 feet pine - $y


80 feet pine - $80y


Total = $351


70x + 80y = 351 --------------------------------- ( 1 )  


Second scenario :


1 feet redwood - $x


100 feet redwood - $100x


1 feet pine - $y


60 feet pine - $60y


total - $420


100x + 60y = 420 ----------------------- ( 2 )


Now let us get both the equations together :


70x + 80y = 351 ------------- ( 1 )


100x + 60y = 420 ------------- ( 2 )


Now let us multiply the  the 1st equation with 3 and the 2nd equation with 4


3 ( 70x + 80y ) = 3 ( 351 )


4 ( 100x + 60y ) = 4 ( 420 )


............................


210x + 240y = 1053


400x +  240y = 1680


...........................


Now let us subtract the first equation from the second ...


400x + 240y = 1680


- ( 210x + 240y ) = - ( 1053 )


......................


190x = 627


dividing by 160 on both sides


x = 627 / 190


x = 3.3


The cost for 1 feet or per foot for the redwood is $3.3


Now substitute the value of x in any given given equation and find out y


I will substitute in the 1st equation


70x + 80y = 351


70 ( 3.3 ) + 80y = 351


231 + 80y = 351


Subtracting by 231 on both sides


80y = 351 - 231


80y = 120


dividing by 80 on both sides


y = 120 / 80


y = 1.5


The cost for 1 feet or per foot for the pine = $1.5


The answers - $3.3 ( redwood ) ; $1.5 ( pine )


Hope my answer helps!


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