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Answer:
cut-off grade of the copper deposit. = 4.6 kg/ton 0r .46 % cu by weight
Explanation:
Given data:
percentage of deposite copper is 0.80%
selling price of cu is $1.73/kg
overall unit cost = $6.5/ton
overall recovery 82%
= 11.3 $/ton
unit profit = (gross value - unit costs)
= (11.3 - 6.5)
=4.84 $/ton
cut off grade of copper deposit
= 4.6 kg/ton 0r .46 % cu by weight
Answer:
Disadvantages of water transfer schemes:
The dams and aqueducts (bridges used to transport water) that are needed are expensive to build;
Building dams can have a negative environmental impact, this includes large-scale flooding of natural habitats;
Fish migration can be disrupted by dams;
Answer:
Cold, dry
Explanation:
Humid air is often more associated with tropical climates, and we can assume from "polar" that the answer would be cold.