Physics Practice: Sound (Mock Test 4 - Expert Level)
1. Expert Analysis: A sonar pulse is sent from a ship to the ocean floor. If the return signal is detected after $3.2 \text{ s}$ and the speed of sound in seawater is $1530 \text{ m/s}$, the depth of the ocean is:
2. Clinical Logic: Why are the strings of different thicknesses used in a Sitar or Guitar?
3. Data-Based: A tuning fork A of frequency $512 \text{ Hz}$ produces resonance with an air column of length $16 \text{ cm}$. Another fork B produces resonance at $32 \text{ cm}$. The frequency of B is:
4. Experimental Setup: In a resonance tube experiment, the first and second resonance lengths are $17 \text{ cm}$ and $52 \text{ cm}$. The end correction of the tube is:
5. Which of the following statements about "Subjective" and "Objective" properties of sound is CORRECT?
6. A man standing between two parallel cliffs fires a gun. He hears the first echo after $1.5 \text{ s}$ and the second after $2.5 \text{ s}$. The distance between the cliffs is: (Speed $= 340 \text{ m/s}$)
7. The frequency of the note produced by a flute is increased by closing more holes. This is because:
8. When a sound wave travels from a rarer to a denser medium (e.g., Air to Water), its speed increases. This results in an increase in its:
9. "Beat" phenomenon is a result of the superposition of two waves of:
10. Expert Fact: The noise level of a quiet room is about $30 \text{ dB}$. If the noise level increases to $60 \text{ dB}$, the intensity of sound has increased by a factor of:
