Properties of sound
A sound wave is a mechanical wave (or mechanical vibration) that transit through media such as gas (air), liquid (water), and solid (wood).
Quality Of Sound
A sound or a sound wave is defined as the energy produced due to the vibrations of particles in a medium. When any medium produces a disturbance or vibrations, it causes a movement in the air particles which produces sound waves. Molecules in the air vibrate about a certain average position and create compressions and rarefactions. This is called pitch which is defined as the frequency of sound. The frequency is defined as the number of oscillations in pressure per second.
Categories of Sound Wave
People perceive sound in different ways, like a medico student takes sound as vibration produced by objects reaching the human eardrum. A physicist perceives sound as vibration produced by an object, which produces disturbances in nearby air molecules that travel further. Both of them describe it as vibration generated by an object, the difference is one talks about how it is received and other deals with how it travels and propagates across various mediums.
![**Question:**
If the period of a wave is 1/25th of a second (0.04 s), what is the frequency of the wave?
- ○ 0.5 Hertz
- ○ 100 Hertz
- ○ 4 Hertz
- ○ 25 Hertz
**Explanation for Educational Website:**
This multiple-choice question is designed to test your understanding of the relationship between the period and frequency of a wave.
- The period of a wave is the time it takes for one complete cycle of the wave to pass a given point.
- Frequency is the number of cycles per second, measured in Hertz (Hz).
To find the frequency, use the formula:
\[ \text{Frequency} = \frac{1}{\text{Period}} \]
In this problem, the period is given as \( \frac{1}{25} \) seconds or 0.04 seconds. Therefore, the frequency can be calculated as:
\[ \text{Frequency} = \frac{1}{0.04 \text{ s}} = 25 \text{ Hz} \]
The correct answer is 25 Hertz.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd60a3440-3bf8-4bab-938f-ebfbc06f5985%2F2f21040f-5af0-4adc-9baa-55a35db8e47b%2Fwydonu_processed.jpeg&w=3840&q=75)
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