The Picture on the Right Represents the Wavefronts of a Supersonic

question 75

Multiple Choice

The picture on the right represents the wavefronts of a supersonic flight.The angle $\theta$ = 40 ^$\circ$ .If the speed of sound is 300 m/s,what is the speed of the plane?

• A)360 m/s
• B)330 m/s
• C)300 m/s
• D)390 m/s
• E)470 m/s

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Definitions:

Salvage Value

An asset’s projected terminal value after the end of its usefulness.

Straight-line Method

A method of depreciation that allocates an equal amount of the asset's cost to each year of its useful life.

Units-of-activity Method

A depreciation method that allocates an asset's cost based on its usage, activities, or units produced, rather than the passage of time.

Double-declining-balance Method

An accelerated depreciation method that doubles the depreciation expense compared to the straight-line method.