A chemistry instructor provides each student with 8 test tubes at the beginning of the year. If there are 28 students per class,
1 answer:
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Answer:
Decreases
Explanation:
The atmospheric pressure on the surface of the mercury pushes it up the evacuated tube until the downward pressure of the mercury equals the atmospheric pressure.
If the atmospheric pressure decreases, the mercury doesn't have to rise as high.
The mercury height decreases.
