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Q.

A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case :

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a

The sound will be louder and the pitch will also be higher

b

The sound will be louder but the pitch will not be different

c

The sound will be louder but the pitch will be lower

d

Both loudness and pitch will remain unaffected

answer is A.

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Detailed Solution

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  • A pitch is a shrillness of a sound. It depends on the frequency of the sound. The frequency of a particular key in a piano is fixed. Therefore, the pitch of sound does not change if the same key is struck again.
  • However, the loudness of the sound can increase as the key is struck harder which causes a higher amplitude that results in a louder sound.
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