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Two musical instruments producing waves of equal energy: amplitude of the second from the first's

The same question, asked 4 times: 9 May 2023 S2*, 10 May 2023 S1*, 26 Apr 2025 S2*, 13 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    9 May 2023 S2

    12
    A musical instrument 'P' produces sound waves of frequency 'n' and amplitude 'A'. Another musical instrument 'Q' produces sound waves of frequency n4\frac{n}{4}. The waves produced by 'P' and 'Q' have equal energies. If the amplitude of waves produced by 'P' is 'APA_P', the amplitude of waves produced by 'Q' will be

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  2. Question 2

    10 May 2023 S1

    48
    A musical instrument X produces sound waves of frequency nn and amplitude AA. Another musical instrument Y produces sound waves of frequency n3\frac{n}{3}. The waves produced by X and Y have equal energies. The amplitude of waves produced by Y will be

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  3. Question 3

    26 Apr 2025 S2

    31
    A musical instrument ' P ' produce sound waves of frequency ' nn ' and amplitude ' AA '. Another musical instrument ' QQ ' produces sound waves of frequency n4\frac{n}{4}. The waves produced by ' P ' and ' QQ ' have equal energies. If the amplitude of waves produced by ' P ' is ' ApA_{p} ', the amplitude of waves produced by ' QQ ' will be

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  4. Question 4

    13 Apr 2026 S1

    121
    A musical instrument P produces sound waves of frequency 'n' and amplitude 'A'. Another musical instrument Q produces sound waves of frequency n/4. The waves produced by P and Q have equal energies. The amplitude of waves produced by Q will be

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