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Author Question: If a plane is flying at a speed so that the apex half-angle of its shockwave is 30, what is its ... (Read 300 times)

BrownTown3

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on: Jul 28, 2018
If a plane is flying at a speed so that the apex half-angle of its shockwave is 30, what is its speed if the speed of sound is 320 m/s?
 a. 960 m/s
  b. 640 m/s
  c. 320 m/s
  d. 160 m/s
  e. Choose this answer if a shock wave cannot form in this situation.

Question 2

If a supersonic plane is flying at increasing speed as the temperature decreases, what happens to the Mach number in this instance?
 a. It stays the same.
  b. It increases.
  c. It decreases.
  d. It can do any of the above.
  e. It can do either (a) or (b) but not (c).


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Jossy

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Reply #1 on: Jul 28, 2018
Answer to Question 1

b

Answer to Question 2

b


BrownTown3

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Reply #2 on: Jul 28, 2018
TY


Jossy

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Reply #3 on: Jul 28, 2018
You're welcome


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