Which of the following quantities are units of impulse? (There ...

[Zoey63294]

Which of the following quantities are units of impulse? (There could be more than one correct choice.)
 
  A) N  m
  B) kg  s/m
  C) kg  m/s
  D) N  s
  E) kg  m2/s2

Question 2

A bat, flying toward the east at 2.0 m/s, emits a shriek that is reflected back to it from a wall that is 20.0 m in front of the bat at the instant the shriek is emitted. Sound travels at 340 m/s in the air.
 
  How many milliseconds after emitting the shriek does the bat hear the reflected echo from the wall?

[TDubDCFL]

Answer to Question 1

C, D

Answer to Question 2

117 ms

[Zoey63294]

Great answer, keep it coming

[Joy Chen]

Thanks for the timely response, appreciate it