For which value of is the range of a projectile fired from ...

[Ebrown]

For which value of  is the range of a projectile fired from ground level a maximum?
 
  A) 30 above the horizontal
  B) 45 above the horizontal
  C) 55 above the horizontal
  D) 60 above the horizontal
  E) 90 above the horizontal

Question 2

Two in-phase loudspeakers are 3.00 m apart. They emit sound with a frequency of 490 Hz.
 
  A microphone is placed half-way between the speakers and then moved along the line joining the two speakers until the first point of constructive interference is found. At what distance from that midpoint is that first point? The speed of sound in air is 343 m/s. A) 0.175 m
  B) 0.350 m
  C) 0.500 m
  D) 0.700 m
  E) There is no point in that line where constructive interference occurs.

[kilada]

Answer to Question 1

B

Answer to Question 2

B

[Ebrown]

Both answers were spot on, thank you once again

[kilada]

Great! Please up vote