These subs are useful in studying the ocean floor, where it is so deep that divers would be crushed by the water pressure. For example, research submersibles are used to study shipwrecks like the RMS Titanic.
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Wheels Working Together The Mayan Calendar consists of three separate corresponding calendars: the Long Count, the Tzolkin (divine calendar), and the Haab (civil calendar). Each of them is cyclical, meaning that a certain number of days must occur before a new cycle can begin. The three calendars are used simultaneously.
Explanation:
Answer:
A Black Loyalist was a person of African descent who sided with the Loyalists during the American Revolutionary War. In particular, the term refers to men who escaped the enslavement of Patriot masters and served on the Loyalist side because of the Crown's promises of freedom.
Some 3,000 Black Loyalists were evacuated from New York to Nova Scotia; they were individually listed in the Book of Negroes as the British gave them certificates of freedom and arranged for transport. The Crown gave them land grants and supplies to help them resettle in Nova Scotia. Some of the European Loyalists who emigrated to Nova Scotia brought their slaves with them, making for an uneasy society. One historian has argued that those slaves should not be regarded as Loyalists, as they had no choice in their fates. Other Black Loyalists were evacuated to London or the Caribbean colonies.
Thousands of African slaves escaped from plantations and fled to British lines, especially after British occupation of Charleston, South Carolina. When the British evacuated, they took many former slaves with them. Many ended up among London's Black Poor, with 4,000 resettled by the Sierra Leone Company to Freetown in Africa in 1787. Five years later, another 1,192 Black Loyalists from Nova Scotia chose to emigrate to Sierra Leone, becoming known as the Nova Scotian settlers in the new British colony of Sierra Leone. Both waves of settlers became part of the Sierra Leone Creole people and the founders of the nation of Sierra Leone. Thomas Jefferson referred to the Black Loyalists as "the fugitives from these States". While most Black Loyalists gained freedom, some did not. Those who were recaptured by slave traders were sold back into slavery and treated harshly for having served under the British.
A drainage basin is a region of land where water from rain or snowmelt flows into an ocean, lake, river, or other body of water.
Answer:
The huge sliding cloud on the volcano is called pyroclastic flow, also known as tephra.
Explanation:
The volcanoes, without exceptions, have eruptions. The eruptions differ though, and it is not just the stereotypical eruption with lava flows and gas propelled high into the atmosphere, but there are many other elements. While pretty much all of the elements of a volcanic eruption are dangerous, some more some less, the most dangerous one comes in the form of a sliding cloud.
This sliding cloud, coming down the sides of the volcano and continuing in the valley below it is known as pyroclastic flow or tephra. It is a very dense cloud of very hot gasses, and on top of it moves very fast, so there isn't escape from it really if someone is on its path. The pyroclastic flow has such a devastating effect that it literary manages to scorch and level down pretty much everything on its path, killing every living organism in the process as well.
