The diagram below illustrates a simple barometer. Which distance measures the atmospheric pressure?
PHYSICS
WAEC 2018
The diagram below illustrates a simple barometer. Which distance measures the atmospheric pressure?
- A. PQ
- B. QR
- C. RS
- D. QS
Correct Answer: B. QR
Explanation
The height of the mercury column in a simple barometer is calculated as the atmospheric pressure.
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