tiffanibell71
05.10.2019 •
Chemistry
Hardness is indirectly related to:
surface roughness
strength of chemical bonds
mass
weight
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Ответ:
Ответ:
The correct answer is B.
Mountain top removal is a method of surface mining, which is used to extract minerals from the surface ridge of mountains. In order to reach the minerals [usually coal] beneath the mountains, dynamites are often used to break apart the rocks, drag lines are then used to remove the split rocks in order to reach the mineral beneath. This method is a controversial method because of the damages it causes to the natural land forms.