The aircraft that generates a shock wave will fly at 1) half ...

[ssal]

The aircraft that generates a shock wave will fly at
 
  1) half the speed of sound.
  2) exactly the speed of sound.
  3) twice the speed of sound.
  4) all of these.
 
  A sonic boom is produced by a missile traveling
  5) near the speed of sound.
  6) at the speed of sound.
  7) only above the speed of sound.
  8) near, at, or above the speed of sound.

Question 2

When light is gravitationally red or blue shifted, that which is shifted is
 
  1) wave frequency,
  2) wavelength,
  3) wave energy,
  4) all of these,
  5) none of these,
 
  and when light is Doppler shifted, that which is shifted is actually
  6) wave frequency.
  7) wave amplitude.
  8) both of these.
  9) none of these.

[Ahernandez18]

Answer to Question 1

Answer: 3, 7

Answer to Question 2

Answer: 4, 6

[ssal]

Excellent

[sultana.d]

Gracias!