An
 approaching 
train
 produces
 the
 RP1
signal
(attention
 signal)
at
 600 Hz .
The
 train
 moves 
with
 the
speed
 of
 120 km. What
 is
 the
 frequency
 and
 the
wavelength
 of 
the
 sound


detected
 by
 a
 person 
standing
 next
 to
 the
 track?


1 answer

See previous post: 5-5-14, 11:42 AM.