Answer:
the detonation of a bomb on Russian soil.
In 1949, the Americans were astonished to see that the U.S.S.R. had detonated their own atomic bomb (as a test) on their grounds. It had been only 4 years since the detonation of the atomic bombs of Hiroshima and Nagasaki and they considered it could not be sufficient time to develop the atomic bomb by themselves. Suspicion of espionage was their main option. Time proved them right. Nearly a dozen Soviet spies were convicted of passing information to the Soviets during this period about the atomic bomb in what was called the "Manhattan Project", the most famous spy being Emil Julius Klaus Fuchs. After this experience, the United States began to invest a large quantity of money in protecting their secret projects and fighting espionage.
The Aztecs, Incas, and Chinese, all had well developed civilizations, and they all used labor force or tributary system. All of them though has different systems and requirements in this department.
The Aztecs had lot of conquered people. They required tribute in the form of people for sacrifice. As the Aztecs has Gods that were very thirsty for human blood, in order to not sacrifice themselves, the Aztecs were taking people for the other tribes and sacrificed them.
The Inca system of labor force seem to have been the most just one. In this system, everyone, apart from the emperor, had to work for the good of everyone and for the good of themselves. Everyone lived in same homes, wore the same clothes, and worked the same types of jobs.
In China, the tribute system was based on forced labor of the people that were conquered. They had to work, produce certain goods, and give part of those goods or part of the profit from those goods to the governing bodies.
B. He improved the steam engine, allowing it to be used in many
industries
Explanation:
- The first steam engine was built in 1698, and by the time Watt was born, the machines, perfected by Thomas Newcomen, were already pumping water from mines throughout the country.
- Sometime around 1764, Watt was given a model of the Newcomen machine to repair it.
- Realizing that it was impossible to repair her, he began to work to improve it.
- He added a separate condensation chamber that prevented excessive steam loss. He patented a new, improved model of a steam engine in 1769.
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B) imports
The Townsend acts taxed imports, such as tea, they wanted to receive revenue from colonists.