Pressure decreases with altitude by 50% with every increase in altitude of how much?
A)1 mile
B)1 km
C)5.5 km
D)10 km

Question

Quizplus · Accepted Answer

The correct choice is C, which corresponds to 5.5 km. This is because of the well-known relationship that atmospheric pressure decreases exponentially with altitude. The exact rate of decrease depends on a variety of factors, but in general, it is commonly said that pressure decreases by 50% with every increase in altitude of about 5.5 km (or roughly 18,000 feet). Therefore, choice C is the correct answer.

Pressure Decreases with Altitude by 50% with Every Increase in Altitude