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What did Luigi Galvani invent?

Galvani's experiments led him to encounter galvanism, the chief phenomenon of which is the emergence of electric current when two different metals make contact with each other in a moist environment. Galvani failed to interpret his findings correctly, however, which allowed Volta to make the important invention. Volta succeeded in inventing the pile by 1799. The pile was a primitive form of wet-cell battery that made possible the presence of a constant source of electric current.

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Why did the Frank family leave Germany?

Otto set up a business in Amsterdam that produced and sold pectin, which is used to make jelly. The family rebuilt their lives in Amsterdam until 1940, when Germany took over the Netherlands. The Nazis began issuing anti-Jewish laws, and the Frank family realized that death and deportation were coming for the Jews in the Netherlands, as it had happened to the Jews in Germany. After unsuccessfully attempting to emigrate from the Netherlands, the Franks decided they had to go into hiding to escape the Nazis, and began organizing. After Anne's sister Margot received a call-up notice in 1942,..

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Where was Agent Orange used?

The herbicides mixture contained dioxin, a known carcinogen and contributor to birth defects, as well as chlorine that is known to cause skin irritation and rashes. Over 30 types of cancer have been linked to Agent Orange exposure including lung and prostate, leukemia, Hodgkins disease and Non-Hodgkin lymphoma. Spina bifida is the birth defect most commonly associated with children conceived after a parent's exposure.

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What were some of the primary crops grown in the New England colonies in America?

The Pilgrims arrived at Plymouth in November 1620 and were soon followed by more settlers, including the Puritans of the Massachusetts Bay Colony in 1630. Farming was literally a life and death matter for the early colonists, as nearly half of the 102 original Plymouth arrivals died the first winter. The deaths resulted from diseases such as scurvy and malnutrition in combination with the harsh conditions that existed on the Mayflower.\nThe New England colonies of America, which eventually became the states of Maine, New Hampshire, Vermont, Rhode Island, Connecticut and Massachusetts, took man..

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In what year did 9/11 happen?

The first signs of disaster surfaced at 8:45 a.m. when an American Airlines jetliner crashed into the north tower of New York's World Trade Center around the 80th floor. Any thoughts of the incident being accidental ended 18 minutes later when a United Airlines jet hit the south tower. Both towers soon collapsed. An hour after the first crash, another American Airlines plane hit the Pentagon. Shortly afterward, a second United Airlines plane crashed in a Pennsylvania field, believed to have been forced down by the passengers and crew in an attempt to thwart another disaster.

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What was the religion in the middle American colonies?

Perhaps the most tolerant of the Middle Colonies was Pennsylvania. It was founded by William Penn, a prominent Quaker who envisioned it as a haven not only for Quakers but for people of all persecuted religious minorities. Pennsylvania attracted colonists from many faith traditions, including Mennonites and Amish, who still contribute to the diversity of the area's religious landscape. The other colonies also were diverse, but none of them quite so actively as Pennsylvania.

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What are the Pentagon Papers?

The report revealed that the United States had been engaging in military action that was intentionally kept from the media. It also revealed the real initial intent of the war was to check the growing power of China, and the United States primarily continued to maintain a presence to avoid the humiliation of defeat. The report was declassified in May 2011.

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What was the impact of the Napoleonic Wars?

Warfare, which was previously treated as more of a sport between kings, increased dramatically in scope. Previously, armies of 30,000 were considered large, but by the end of these wars around 1815, armies of 500,000 had been fielded, and more than 3 million Frenchmen had been involved in the war. At Leipzig alone, nearly 150,000 men were killed or wounded.\nNapoleon's vision was to free Europe from the tyranny and oppression of monarchs and place government in the hands of the people. Although Napoleon did not achieve his vision completely, his wars effectively ended feudalism and ushere..

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When was the lightning rod invented?

Benjamin Franklin was inspired to invent the lightning rod to protect homes from the damaging fires caused by lightning strikes. Lightning rods and conductors attract the electricity generated by a lightning strike. Conductive wires and electrodes attached to the lightning rod direct the electricity safely to the grounding rod or ground.

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How do the Zhou and Shang dynasties compare?

The Shang family assumed control over Ancient China following the reign of the Xia clan and was ultimately succeeded by the Zhou dynasty. The Shang and Zhou clans shared an interest in promoting education and establishing familial and social order. Both families built strong city walls to physically separate classes of citizens; the few wealthy Chinese residents lived in city and urban areas, while the majority of the poor, farming population lived in surrounding villages. Upon assuming the throne, the Shang family established a domestic family structure, which placed the father or oldest son ..

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