Новое решение
en/3.7.15.md
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| + | ### Statement | ||
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| + | $3.7.15.$ [Insert the problem statement] | ||
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| + | ### Solution | ||
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| + | Since the speed of the plane exceeds the speed of sound, a spherical wave emitted at a later time is not contained in another spherical wave emitted at an earlier time. As a result, an envelope (i.e. shock wave) of these spherical waves is formed in the shape of a cone. In the figure, the shock wave (red) reaches an observer at $A$ as a loud popping noise before a spherical wave (blue) emitted from $B$ arrives as the noise of the engines a short moment later, by which time the shock wave (blue) has already passed the observer. | ||
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| + | #### Answer | ||
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| + | [Insert a concise answer or boxed result] | ||
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| ### Statement | |||
| $3.7.15.$ [Insert the problem statement] | |||
| ### Solution | |||
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| Since the speed of the plane exceeds the speed of sound, a spherical wave emitted at a later time is not contained in another spherical wave emitted at an earlier time. As a result, an envelope (i.e. shock wave) of these spherical waves is formed in the shape of a cone. In the figure, the shock wave (red) reaches an observer at $A$ as a loud popping noise before a spherical wave (blue) emitted from $B$ arrives as the noise of the engines a short moment later, by which time the shock wave (blue) has already passed the observer. | |||
| #### Answer | |||
| [Insert a concise answer or boxed result] | |||