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Questions and Answers
What is the primary function of waves?
What is the primary function of waves?
- To transmit energy from one point to another (correct)
- To create a disturbance that remains stationary
- To transfer matter from one point to another
- To change the direction of travel
In a transverse wave, what is the direction of the disturbance relative to the direction of travel?
In a transverse wave, what is the direction of the disturbance relative to the direction of travel?
- Parallel
- Perpendicular (correct)
- Diagonal
- Random
Which type of wave does not require a medium to travel through?
Which type of wave does not require a medium to travel through?
- Water wave
- Electromagnetic wave (correct)
- Mechanical wave
- Sound wave
What determines the speed of a wave on a string?
What determines the speed of a wave on a string?
What is the characteristic of a wave that remains constant when it travels from one medium to another?
What is the characteristic of a wave that remains constant when it travels from one medium to another?
What type of wave is a light wave?
What type of wave is a light wave?
What happens to the speed of a wave on a string if the tension is increased?
What happens to the speed of a wave on a string if the tension is increased?
How does the wavelength of a sound wave change when its frequency increases?
How does the wavelength of a sound wave change when its frequency increases?
What type of wave is sound?
What type of wave is sound?
What is the period of a wave with a frequency of 25 Hz?
What is the period of a wave with a frequency of 25 Hz?
What is the frequency range of sound that a healthy young person can hear?
What is the frequency range of sound that a healthy young person can hear?
What is the speed of sound in air at room temperature?
What is the speed of sound in air at room temperature?
What is a characteristic of periodic waves?
What is a characteristic of periodic waves?
What is the wavelength of a transverse wave on a string with a speed of 150 m/s and a frequency of 30 Hz?
What is the wavelength of a transverse wave on a string with a speed of 150 m/s and a frequency of 30 Hz?
How does the speed of a particle in a wave moving along a string compare to the wave speed?
How does the speed of a particle in a wave moving along a string compare to the wave speed?
Through which of the following can sound not travel?
Through which of the following can sound not travel?
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Study Notes
Nature of Waves
- A common feature of all waves is that they carry energy from place to place.
- In a transverse wave, the disturbance occurs perpendicular to the direction of travel of the wave.
- Light waves are an example of transverse waves.
- In a longitudinal wave, the disturbance occurs parallel to the direction of travel of the wave.
- Sound waves are an example of longitudinal waves.
Periodic Waves
- The frequency of a wave remains constant when it travels from one medium to another.
- When the frequency of a sound wave increases, its wavelength decreases.
- The period of a wave is the time taken to complete one cycle, and it is inversely proportional to the frequency.
- Periodic waves have repeating patterns, and they consist of cycles produced over and over again.
Speed of Waves on a String
- The speed of a wave on a string is determined by the tension and linear density of the string.
- If the tension in a string is increased, the speed of the wave on the string will also increase.
- The formula to calculate the speed of a wave on a string is √(T/μ), where T is the tension and μ is the linear density.
Nature of Sound
- Sound waves are longitudinal waves.
- Sound waves cannot travel through a vacuum.
- The frequency range of sound that a healthy young person can hear is between 20 Hz and 20 kHz.
- The speed of sound in air at room temperature is approximately 343 m/s.
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