30 Questions
What is the direction of oscillations in longitudinal waves?
Along the direction of wave travel
What is the amplitude of a wave?
The maximum displacement of the wave from the equilibrium position
What is the wavelength of a wave?
The distance between successive 'like' points on a wave
Which type of wave has oscillations perpendicular to the direction of wave travel?
Transverse wave
What is a common example of a longitudinal wave?
Sound wave
What is the definition of a wave?
A disturbance that propagates from one place to another
What is the main characteristic of sound intensity?
The amount of energy that passes through a given area in a given time
What is the SI unit of sound intensity?
Watt per meter squared
How does sound intensity from a point source change with distance?
It decreases as the square of the distance
What is the application of sound intensity in biology?
Echolocation in bats
What is the principle behind sonar?
Underwater reflection of sound waves
What is the term used to describe the process of sound waves being sent and reflected through water?
Underwater echolocation
What is the change in pitch of a sound when the source and observer are moving relative to each other?
The Doppler effect
What is the unit of sound intensity level?
Decibel (dB)
How much does the intensity of a sound increase with each increase in intensity level of 10 dB?
It doubles
What is the relationship between the intensity of a sound and how loud it seems?
A sound that seems twice as loud is ten times more intense
What is the faintest sound that can be heard?
Threshold of human hearing
What is the relationship between a bel and a decibel?
A decibel is a tenth of a bel
What happens when the source moves faster than the speed of sound?
A sonic boom is created
What is the Doppler effect used for in medical diagnostics?
To evaluate blood velocity
What is the frequency range of ultrasound waves?
Above 20 KHz
What is the purpose of Doppler imaging?
To visualize velocities of moving tissues
What is shown in a Doppler echocardiogram?
The direction of blood flow with different colors
What is the Doppler effect used for in weather radar?
To track storm movement
What determines the fundamental frequency of a string on a musical instrument?
The length and/or linear density of the string
Why do guitar strings have different fundamental frequencies?
Because they have different densities
What is varied in a piano to produce different frequencies?
The length and density of the strings
How are individual strings tuned to exact frequencies?
By changing the tension of the string
Why is it desirable to have small variations in tension between strings in a musical instrument?
To prevent warping and other damage
What is the characteristic shape of a grand piano's sound box due to?
The variation in length and density of the strings
Explore the different types of waves, including longitudinal waves, and their properties. Learn about oscillations, direction of travel, and examples of each type. Test your understanding of waves and their characteristics.
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