The Compromise of 1850 was an effort to preserve the balance between slave states and free states and keep the union together in the United States.
The Compromise of 1850 was passed after an attempt to have all new territories be non-slave states. In 1846, Congressman David Wilmot of Pennsylvania introduced an amendment to an appropriations bill, stipulating that any territory gained from Mexico (after winning war vs. Mexico) would be free, not allowing slavery. [Don't think of Wilmot as an abolitionist, though. He wanted new territories to be free of blacks, preferring whites-only territories.] Wilmot's amendment passed in the House of Representatives, but was unable to get approval in the Senate. The Compromise of 1850, a package of five bills passed by Congress in September of that year, sought to accommodate some of the issues both South and North were debating during those years. The balance between slave states and free states continued to be an issue.
The earliest Chinese bronzes were created using the piece-mold casting method, as opposed to the lost-wax method used by all other Bronze Age cultures.
In piece-mold casting, a model of the object to be cast is created, and a clay mold of the model is created.
The process of pouring molten bronze into a hollow mold to create a positive bronze sculpture or object is known as bronze casting.
Bronze sculptures, instruments, medals, tools, plaques, and other items are made using bronze casting methods such as lost wax, ceramic shell, and sand casting.
Casting is a traditional Chinese casting technique for attaching prefabricated handles and other small accessories to larger bronze objects.
To know more about ancient bronze-casting technique was developed by the Chinese here
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I hope this helps you with the background.
They had the idea of the republic government
I believe the correct answers are Facebook and Twitter.
Given that he understands the popularity of such social medias and how they can be used for public communications, he did use them quite effectively. He is not the only president to do that, as President Trump is also quite active on Twitter.