The answer is a telegraph.
Especially known as the creator of the incandescent lamp, Thomas Edison was responsible for several devices important to the trajectory and development of mankind.
<u>One of the earliest inventions that made Thomas Edison famous, the phonograph was the first machine capable of recording and reproducing sounds.
</u>
The telegraph breakthrough occurred while Edison was trying to improve the telegraph transmitter when he realized that the movement of the paper tape through the machine produced a noise that resembled spoken words when played at high speed.
Answer:
Gulag
Explanation:
The Gulag was a system of forced labor camps established during Joseph Stalin's long reign as dictator of the Soviet Union. The word “Gulag” is an acronym for Glavnoe Upravlenie Lagerei, or Main Camp Administration
The air pollution in London reached its highest point around 1875.
As a result of the Industrial Revolution, London became:
- overpopulated
- heavily polluted
- quite noisy
From the description of the graph, we can tell that around the year 1875, London suffered the highest air pollution shown by the graph as air pollution reached 610 micrograms per cubic meter.
In conclusion, 1875 saw the worst air pollution in London according to this graph but it is a good thing that this has improved massively as of 2016.
<em>Find out more at brainly.com/question/12048112.</em>
The correct answer is B; A communist threat inside the US.
Further Explanation:
Alger Hiss was an American citizen who went to jail for approximately 10 years in 1950. He was first charged with espionage but since the statue had run out, he was convicted of perjury. He was working with the government and was a suspected spy for the Russians.
The McCarthy Hearings was a trial that a well known senator named, Joseph McCarthy and the United States Army brought forth. The senator accused more than 250 people who were high in the government of being spies and having close connections of being a spy.
Learn more about the Rosenberg Trials at brainly.com/question/12890186
#LearnwithBrainly
