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SVETLANKA909090 [29]
3 years ago
10

X-Ray were discovered by accident

History
1 answer:
11111nata11111 [884]3 years ago
4 0

Answer:

True

Explanation:

Röntgen's discovery occurred accidentally in his Wurzburg, Germany, lab, where he was testing whether cathode rays could pass through glass when he noticed a glow coming from a nearby chemically coated screen. He dubbed the rays that caused this glow X-rays because of their unknown nature.

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aleksklad [387]

Answer:

Option C, the closing of the western frontier, is the right answer.

Explanation:

An argument that claimed that American democracy was established by the American frontier came to be known as the Frontier Thesis. This argument was presented by historian Frederick Jackson Turner in the year 1893. He argued that the primary result of the American frontier was American democracy along with a lower interest in high culture, violence and egalitarianism.

4 0
3 years ago
What was not a source of energy introduced during the late 1800's?
xenn [34]
<span> In the last quarter of the 19th century, all four items were sources of energy. Kerosene was commonly used for lighting, electricity was beginning to replace gas lighting and steam was used to power boats, trains, and certain kinds of industrial machinery. Gasoline was the primary fuel of the automobile, or "horseless carriage," which appeared in the 1890's. Of these four, however, steam was introduce the earliest. The concept of the steam engine goes back to ancient times. However, the steam engine was really introduced as a common source of energy early in the 18th Century. So while kerosene, gasoline, and electricity as an energy source were all developments of the 19th century, Steam power is at least a century (and maybe more) older. </span>
5 0
3 years ago
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finlep [7]

The correct answer is c) Question assumptions.

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Lunna [17]

Answer: C- to protect citizens' rights​

Explanation:

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