Subparts number 14,15,16
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Subparts number 14,15,16,17,18,19,80
Transcribed Image Text:B. Write "SOUND" if the statement is TRUE and "BEAT" if the statement is
FALSE.
11. When an object is forced to vibrate at its natural frequency, resonance occurs.
12. Beats occur when two tuning forks at slightly different frequencies are sounded
together.
13. Almost everything that exists has a natural frequency.
14. Even steel bridge can collapse because of resonance.
15. Interference patterns are produced when two sources of waves are placed side by
side.
16. Two speakers
where there is no sound.
an be set side-by-side so there are some places in front of them
17. The Inversę Square Law states that the intensity of the influence at any given
radius (r) is the source strength divided by the area of phenomena.
18. Sounds whose frequencies are below 20 Hz are called ultrasounds.
19. Sound intensity level which measures the loudness of a sound perceived by
human ear is measured in power.
20. Harmonic series is neither a series of frequencies of fundamental frequency nor
integral multiples of fundamental frequency.
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