How does barometric atmospheric pressure vary with increasing elevation__________________?
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Answer: B. first slowly and then steeply
Explanation
Barometric atmospheric pressure decreases with altitude due to the reducing weight of the overlying air column. Lower atmospheric layers are dense, causing pressure to drop slowly at first near sea level. Higher altitudes feature exponentially thinner air, causing barometric pressure to drop much more steeply. The barometric formula describes how atmospheric pressure changes with height above sea level. Air density and temperature gradients directly affect the vertical pressure profile of the atmosphere. Standard atmospheric pressure at sea level is defined as one hundred one point three kilopascals.
Aircraft altimeters rely on barometric pressure measurements to determine altitude during flight operations. Climbers scaling high mountains experience physiological distress due to the steep drop in oxygen pressure. Meteorologists analyze barometric pressure changes to forecast approaching weather systems accurately. Option A is incorrect because atmospheric pressure does not decrease in a simple linear fashion with height. Option C reverses the actual rate of pressure change by claiming it drops steeply first and then gradually. Option D is wrong because atmospheric pressure decrease follows well-established barometric laws.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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