# FORMULAS FOR CALCULATING THE SPEED OF SOUND …

The **speed** of sound in a gas is directly proportional to absolute temperature. 3 k,2 k,1 2 1 T T c c ... The stratosphere is the region above 11 km and **below** 50 km. The stratosphere is divided into two parts for the purpose of this tutorial. The lower stratosphere extends from 11 km to 20 km. The temperature remains constant

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