jalonjonrs4692 jalonjonrs4692

22-07-2019
Computers and Technology

contestada

Which black inventor patented fifty different devices, most of them dealing with the lubrication of machines, and successfully contested claims against the genuineness of his designs?

Respuesta :

mbm1000 mbm1000

28-07-2019

Answer:

American engineer Elijah McCoy was born in Canada but became US citizen very young, and and made vital contributions in the United States after the Civil War such as in the progress of locomotives design and railroads in America, the automatic lubrication systems for steem engines and many other inventions among his 57 U.S. patents that made train travel more efficient.

Explanation:

Answer Link

Otras preguntas

the person using the track with the rollers uses less energy to load the box because the rollers reduce the

What underlying idea can you infer about ancient Greek society from this passage? A. Men fought more battles than women. B. Old men were more desirable than old

Read this line from Chapter 1: You know this stuff inside and out, backwards and forwards. Based on the sentence, what does the phrase inside and out mean? A. I

What percent of 137 is 86?

what is a sign of genetic mutation

Which sentence uses italics or quotation marks correctly? A. Our local metropolitan newspaper is called "The Houston Chronicle." B. She enjoyed Rudyard Kipling'

how is a common denominator and common multiple alike?

Which sentence uses a verb that agrees with its pronoun subject? A. Have I grown any taller since last year? B. Doesn't you want to know what's inside the box?

1/8 divided by 4 normal answer and simplifed answer

Are the lines 2y-10x=4 and y-2=5x parallel ??