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Time t for sound to reach the closed end of a pipe in its fundamental mode: frequency of the air column

The same question, asked 2 times: 20 Apr 2025 S1, 13 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    20 Apr 2025 S1

    8
    In fundamental mode, the time required for the sound wave to reach up to closed end of a pipe filled with air is ' tt ' second. The frequency of vibration of air column is (Neglect end correction)

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  2. Question 2

    13 Apr 2026 S1

    123
    In fundamental mode, the time required for the sound wave to reach upto the closed end of a pipe filled with air is tt second. The frequency of vibration of air column is (λ\lambda = wavelength of the wave)

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