Coal Mining Is a Dangerous and Dirty Job

question 411

Multiple Choice

Coal mining is a dangerous and dirty job. Suppose someone developed new machinery that made coal mining safer and cleaner; at the same time, suppose it made coal miners more productive. We would expect that the wages of coal miners would

• A)rise.
• B)fall.
• C)stay exactly the same.
• D)rise, fall, or stay the same.

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Definitions:

Bulges

Protrusions or outward expansions often seen in materials, body parts, or other physical objects.

EOG

Electrooculography involves measuring the standing potential between the cornea and retina, which is present from the front to the back of the human eye.

EEG

Electroencephalography, a method to record electrical activity of the brain through electrodes placed on the scalp.

EMG

A medical procedure known as electromyography is utilized to examine the well-being of muscles and their controlling nerve cells.