The air pressure. the air pressure increases as the altitude an object is at increases.
Your answer is going to be b
Three uses of coal:
1. Electricity generation
2. Steel production
3. Cement manufacturing and as a liquid fuel
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a metal with a large number of free-flowing electrons most likely have good conductivity
Answer:

Explanation:
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In this case, when performing units conversions involving two proportional factors we need to make sure we first convert to the base unit and then to the target one; thus, since 1 kg = 1000 g and 1 g = 1000 mg, we set up the following expression:

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