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Questions and Answers
What is the primary medium for the propagation of sound?
What is the primary medium for the propagation of sound?
- Steel
- Vacuum
- Air (correct)
- Water
What is the speed of sound in air at 20°C?
What is the speed of sound in air at 20°C?
- 1500 m/s
- 1800 m/s
- 343 m/s (correct)
- 760 m/s
Which of the following factors does not affect the speed of sound?
Which of the following factors does not affect the speed of sound?
- Humidity
- Frequency (correct)
- Pressure
- Temperature
What is the unit of measurement for the intensity of sound?
What is the unit of measurement for the intensity of sound?
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Study Notes
Sound Propagation
- Sound primarily propagates through a medium, which can be solid, liquid, or gas; air is the most common medium for everyday sound transmission.
Speed of Sound
- The speed of sound in air at a temperature of 20°C is approximately 343 meters per second (m/s).
Factors Affecting Sound Speed
- Various factors influence the speed of sound, including temperature, density, and elasticity of the medium; however, humidity does not significantly impact sound speed.
Sound Intensity Measurement
- The intensity of sound is measured in decibels (dB), which quantify the pressure level of sound relative to a reference level.
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