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Goryan [66]
3 years ago
9

How is coal removed from the ground?

Biology
2 answers:
inn [45]3 years ago
6 0
Machines are used to remove coal from the ground, there are two ways, one of them implies surface mining, where they dig the dirt, then filter it to find coal, the second way implies underground mining, where workers go deep down, to find coal.
faust18 [17]3 years ago
3 0
Coal miners use giant machines to remove coal from the ground. They use two methods: surface or underground mining.
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A bird is flying in the air at a 4 m/s. If the mass of the bird is 7kg what is it’s kinetic energy
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Explanation:

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