Question

1.Rapid back and forth motion of a particle
about its mean position is called
position is called *
2 points
longitudinal wave
transverse wave
stationary wave
2.If the energy in a longitudinal wave travels
from south to north, the particles of the
medium would be vibrating in
*
2 points
frequency
amplitude
wavelength
3.A whistle giving out a sound of frequency
450 Hz, approaches a stationary observer at
a speed of 33 m/s. The frequency heard by
the observer is (speed of sound=330m/s).......
. *
2 points
100
500
200
300
4.The sound waves are reflected from an
obstacle into the same medium from
which they were incident. Which of the
following changes? *
2 points
speed
frequency
wavelength
none of the above
5.The frequency, which is audible to the
human ear is...........kHz
*
2 points
50
20
15000
10000​

Answer 1

Answer:

50

20

15000

10000

1000000

Answer 2

Explanation:

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