D sounds more formal than the rest.
Answer:
A renewable electricity generation technology harnesses a naturally existing energy. But they have other features that a few fringe customers value.
Explanation:
Answer:
One inlet stream to the mixer flows at 100.0 kg/hr and is 35wt% species-A and 65wt% species-B.
Explanation:
Answer:
A mock-up
Explanation:
It is made of cheap and easy to access parts.