As air flows through a shock wave: a. its speed increases. b.its speed decreases. c. its speed remains the same. d it changes direction to flow paral

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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10.
As air flows through a shock wave:
a. its speed increases.
b.its speed decreases.
c. its speed remains the same.
d.it changes direction to flow parallel with the Mach cone.
11.
If an aeroplane accelerates above the critical Mach number, the first high Mach
number characteristic it will usually experience is:
a. a nose-up pitch or "Shock Stall".
b.a violent and sustained oscillation in pitch (porpoising).
c. Dutch roll and/or spiral instability.
d.a nose-down pitching moment (Mach, or high speed tuck).
12.
High speed buffet is caused by:
a. the shock waves striking the tail.
b.the high speed airflow striking the leading edge of the wing.
C. wing flutter caused by the interaction of the bottom and top surface shock
waves.
d.the airflow being detached by the shock wave and the turbulent flow striking
the tail.
Transcribed Image Text:10. As air flows through a shock wave: a. its speed increases. b.its speed decreases. c. its speed remains the same. d.it changes direction to flow parallel with the Mach cone. 11. If an aeroplane accelerates above the critical Mach number, the first high Mach number characteristic it will usually experience is: a. a nose-up pitch or "Shock Stall". b.a violent and sustained oscillation in pitch (porpoising). c. Dutch roll and/or spiral instability. d.a nose-down pitching moment (Mach, or high speed tuck). 12. High speed buffet is caused by: a. the shock waves striking the tail. b.the high speed airflow striking the leading edge of the wing. C. wing flutter caused by the interaction of the bottom and top surface shock waves. d.the airflow being detached by the shock wave and the turbulent flow striking the tail.
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