hannahbanana2000
09.03.2020 •
Chemistry
Sound is not heard clearly in big halls.Why?
Sometimes,sodium chloride solution is poured in a permutit vessel.Why?
If you are kept blind folded in a room,how can you find out whether the room is occupied by producing sound?
plz answer all the questions
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Ответ:
I believe it is the second one, B
Explanation:
The thirteenth amendment abolished slavery.
The fourteenth amendment made former slave U.S. citizens.
The Reconstruction act protected African- AMerican homes and property.
The Black codes restricted Arican Americans freedom, and made them work for low wages.