c.) Write 'true' or 'false' for the following statements :
1. )The range of sonic vibrations is between 20 Hz and 20,000 Hz.
2.) More the amplitude of a vibration, less is its
loudness.
3.) With the increase in the frequency of a body, the sound becomes shrill.
4.) Subsonic waves are used in dish washing machines.
5.) Sound energy is reflected by soft and loose surfaces.
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Answer:
Explanation:
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1.True
2.False
3.True
4.False
5.True