The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?
Solution and Explanation
Frequency is calculated as the number of oscillations divided by the total time:
Frequency = \(\frac{\text{Number of oscillations}}{\text{Total time}}\)
The number of oscillations is determined by multiplying the frequency by the total time:
Number of oscillations=Frequency × Total time
In the given scenario:
Frequency of sound = 100 Hz
Total time = 1 minute (1 minute = 60 seconds)
Therefore, the number of oscillations or vibrations is calculated as:
Number of oscillations=100×60=6000
Hence, the source undergoes 6000 vibrations in a minute, generating a frequency of 100 Hz.
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Concepts Used:
Sound
Sound is a vibration that propagates the mechanical wave of displacement and pressure, through a medium can be of any matter. In other words, the sound is the thin line between Music sound and Noise.
Types of Sounds:
Sound can be divided into two types depending on its frequency. The following are:-
Infrasonic Waves:
- Infrasonic waves have a frequency lower than 20 Hz. Since it is below the human hearing range, it is inaudible to humans.
- However, several other living organisms use these waves to communicate, whales, sharks, elephants, hippopotamus, etc. these waves are also used in the scientific field, it is used to study upcoming earthquakes, volcanic eruptions, human heart rates, rock formation stages, etc.
Ultrasonic waves:
- Ultrasonic waves have a frequency higher than 20 kHz. Since it is above the human hearing range, it is inaudible to humans.
- These waves are used in the scientific field, it is used to study human heart rates, to take sonograms, navigation of directions, imaging things, uniform sample mixing, communication, testing of samples, etc.