Two in-phase loudspeakers are 3.0 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) 0.18 m
B) 0.35 m
C) 0.50 m
D) 0.70 m
E) There is no point in that line where constructive interference occurs.
B
You might also like to view...
What do we mean by the spin of a subatomic particle?
A) It is one of the basic properties of any particle and is a measure of the particle's angular momentum. B) It describes how fast the particle is rotating on its axis at a given time; if more torque is applied, the particle spins faster. C) It is a measure of the particle's electrical charge. D) The spin of a particle describes how the story of the particle is portrayed to journalists.
A 475 gram ball is traveling horizontally at 12.0 m/s to the left when it is suddenly struck horizontally by a bat, causing it to reverse direction and initially travel at 8.50 m/s to the right
If the bat produced an average force of 1275 N on the ball, for how long (in ms) was it in contact with the ball?
Carbon dioxide is removed from the air by ______________
Fill in the blank(s) with correct word
The radiation emitted from a small hole in a furnace is
a. ultraviolet b. infrared c. x ray d. microwave e. blackbody