Question
Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air.
-
increases by a factor 20
-
increases by a factor 10
-
decreases by a factor 20
-
decrease by a factor 10
Solution
A.
increases by a factor 20
Velocity of sound v = nλ
