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What is the region in a finite wave called where density increases?

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in Aerodynamics by (773k points)
What is the region in a finite wave called where density increases?

(a) Compression region

(b) Expansion region

(c) Linearized region

(d) Propagating region

I had been asked this question during an online interview.

My question is based upon Finite Waves in chapter Unsteady Wave Motion of Aerodynamics

1 Answer

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Right option is (a) Compression region

Easy explanation: The density of the finite wave varies along the distance of its propagation. The region where the density increases is known as the finite compression region, and the portion where the density decreases is known as the finite expansion region.

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