A mechanical piano key struck gently, then hammered again, this time much harder. In the second situation:

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Sound will be louder but pitch will not be different

Sound will be louder and pitch will also be higher

Sound will be louder but pitch will be lower

Both loudness and pitch will remain unaffected

answer is A.

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Detailed Solution

To find the correct option, distinguish between the correct options based on the sentences given in the option. We know that, pitch of sound depends on frequency loudness of sound depends on amplitude.

Any sound wave pitch depends on the frequency of the wave.

When mechanical piano is struck harder the second time, we find sound will be louder but pitch remains same, because the frequency has not changes.

Hence, A mechanical piano key struck gently, then hammered again, this time much harder. In the second situation sound will be louder but pitch will not be different.

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