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What is lapse rate?

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in Aircraft Performance by (558k points)
What is lapse rate?

(a) Change of temperature with respect to altitude

(b) Change of temperature with respect to pressure

(c) Change of pressure with respect to altitude

(d) Change of temperature with respect to density

I got this question in final exam.

Question is from Standard Atmospheric Model in portion Atmosphere and Air Data Measurement of Aircraft Performance

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Correct answer is (a) Change of temperature with respect to altitude

Easy explanation: Lapse rate is the change of temperature with respect to altitude. The temperature lapse rate is linear at tropopause to stratosphere. The lapse rate is zero in from the altitude 11km to 20km. The temperature lapse rate becomes positive at the middle of stratosphere.

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