The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel. Steam coal - also known as thermal coal - is mainly used in power generation.
Answer:
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Explanation:
Answer:
B — to relate the type of box material to the warmth of air within the box
Explanation:
She changed the box material and measured the warmth of the air in the box.
A is wrong. The question does not mention the mass of the box.
C is wrong. The boxes were all the same size.
D is wrong. Each box was exposed for the same length of time.
<span>What is the approximate age of our solar system?
</span>b. 4.6 billion years
