As altitude increases, pressure
- decreases exponentially.
- reduces at a constant rate.
- rises exponentially.
Explanation
Pressure results from the weight of the overlying air, and as that mass diminishes with height the fall in pressure is rapid low down and progressively slower higher up, giving an exponential decay. A constant-rate reduction would wrongly imply equal pressure loss for every thousand feet regardless of altitude.
davide_gibbo asking:
Isn't:-1hPa in 27ft. So why it decreases exponentially?
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