Answer:
1. carbonation
2. Hydration
3. Hydrolysis.
4. Oxidation-reducation reaction
Answer:
Generally they are divided into the following categories: small towns-up to 10,000 inhabitants, 10,000-20,000, and 20,000-50,000; medium-size cities, 50,000–100,000 inhabitants; and large cities- 100,000-300,000 and 300,000-1,000,000 inhabitants.
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An astronaut is able to float slightly on the moon due to the gravity, the gravity being 1.62 m/s² which would be lighter then the earth's which is 9.78 m/s².
A wall stands using gravity. It is constantly being pulled down. Many also place them in ways that they dig into the ground, and almost make a socket just for the wall to be placed, using the land that is there. More and more walls are placed and eventually, they make flooring and a roof.
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