Sound is produced by

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• C-07-Q050To produce and hear a sound, what is required?
• C-07-Q051In humans, sound is created by the vibration of
• C-07-Q052Why is the voice of a male coarse (low frequency)?
• C-07-Q053The voice of a female is high pitched because
• C-07-Q054The bell-jar experiment with an electric bell shows that
• C-07-Q055The audible range of frequency for normal human ears is
• C-07-Q056Sound of frequency below 20 Hz is called
• C-07-Q057Sound of frequency above 20 kHz is called
• C-07-Q058Before earthquakes, animals often panic because they hear
• C-07-Q059Sound is called a mechanical wave because its propagation requires