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Questions and Answers
Draw a transverse wave and label the following parts: amplitude, wavelength, crest, and trough.
Draw a transverse wave and label the following parts: amplitude, wavelength, crest, and trough.
Draw and label a longitudinal wave. Include compression, rarefaction, and wavelength.
Draw and label a longitudinal wave. Include compression, rarefaction, and wavelength.
Give examples of the waves drawn in #1 and #2.
Give examples of the waves drawn in #1 and #2.
Examples of a transverse wave are water waves and light waves; examples of a longitudinal wave are sound waves and a slinky being pushed back and forth.
In a sound wave, what are compressions and rarefactions?
In a sound wave, what are compressions and rarefactions?
What is a bow wave and how is it created?
What is a bow wave and how is it created?
What is a sonic boom?
What is a sonic boom?
How do you find the wavelength of a standing wave?
How do you find the wavelength of a standing wave?
Describe the movement of a transverse wave and a longitudinal wave.
Describe the movement of a transverse wave and a longitudinal wave.
What is the source of all wave motion?
What is the source of all wave motion?
What does it mean to say that frequency and wavelength are inversely proportional?
What does it mean to say that frequency and wavelength are inversely proportional?
What are harmonics and what is the lowest natural frequency called on a standing wave?
What are harmonics and what is the lowest natural frequency called on a standing wave?
What is the definition of wavelength?
What is the definition of wavelength?
How do you find the speed of a wave?
How do you find the speed of a wave?
If a sound wave has a 450 Hz frequency and a wavelength of 3 meters, what is the speed of the wave?
If a sound wave has a 450 Hz frequency and a wavelength of 3 meters, what is the speed of the wave?
A wave has a frequency of 600 Hz and a speed of 20 m/s. What is its wavelength?
A wave has a frequency of 600 Hz and a speed of 20 m/s. What is its wavelength?
A sound wave has a wavelength of 5 m in room temperature air. What is its frequency?
A sound wave has a wavelength of 5 m in room temperature air. What is its frequency?
What are the 4 different actions a wave can take when it encounters an object?
What are the 4 different actions a wave can take when it encounters an object?
Explain or define each of the 4 actions a wave can take when it encounters an object.
Explain or define each of the 4 actions a wave can take when it encounters an object.
Why would a theater use curtains to reduce echoes during performances?
Why would a theater use curtains to reduce echoes during performances?
What is constructive interference?
What is constructive interference?
What is destructive interference?
What is destructive interference?
What does it mean when waves are in phase?
What does it mean when waves are in phase?
What does it mean when waves are out of phase?
What does it mean when waves are out of phase?
If a school's marching band is practicing behind the school, why are students able to hear the band in the front of the school?
If a school's marching band is practicing behind the school, why are students able to hear the band in the front of the school?
Noise cancelling headphones are a form of what kind of interference?
Noise cancelling headphones are a form of what kind of interference?
Typically, how fast does sound travel?
Typically, how fast does sound travel?
Explain in detail the Doppler Effect.
Explain in detail the Doppler Effect.
Does the Doppler Effect only apply to sound waves?
Does the Doppler Effect only apply to sound waves?
During the Doppler Effect, what property of waves is changing?
During the Doppler Effect, what property of waves is changing?
When a sound source moves toward you, what happens to the wave speed?
When a sound source moves toward you, what happens to the wave speed?
The pitch of a sound is directly related to the sound's what?
The pitch of a sound is directly related to the sound's what?
How do you measure the loudness of sound?
How do you measure the loudness of sound?
In which type of material do waves travel the fastest?
In which type of material do waves travel the fastest?
Explain what resonance is.
Explain what resonance is.
What happens when an aircraft flies faster than the speed of sound?
What happens when an aircraft flies faster than the speed of sound?
What type of wave is a sound wave?
What type of wave is a sound wave?
What about a water wave?
What about a water wave?
How many wavelengths are shown if given a picture of a transverse wave?
How many wavelengths are shown if given a picture of a transverse wave?
Below is a standing wave that is 7 meters long. What harmonic is represented in the diagram?
Below is a standing wave that is 7 meters long. What harmonic is represented in the diagram?
How many nodes are seen?
How many nodes are seen?
How many antinodes are represented?
How many antinodes are represented?
Find the wavelength of this standing wave.
Find the wavelength of this standing wave.
In a transverse wave, how many wavelengths are represented?
In a transverse wave, how many wavelengths are represented?
What is the v if ƛ = 8 m and f = 20 Hz?
What is the v if ƛ = 8 m and f = 20 Hz?
What is the ƛ if v = 50 m/s and f = 25 Hz?
What is the ƛ if v = 50 m/s and f = 25 Hz?
What is the f if v = 50 m/s and ƛ = 10 m?
What is the f if v = 50 m/s and ƛ = 10 m?
What is the v if ƛ = 1 m and f = 345 Hz?
What is the v if ƛ = 1 m and f = 345 Hz?
What is the ƛ if v = 100 m/s and f = 3 Hz?
What is the ƛ if v = 100 m/s and f = 3 Hz?
What is the f if v = 120 m/s and ƛ = 3 m?
What is the f if v = 120 m/s and ƛ = 3 m?
What is the v if ƛ = 3 m and f = 10 Hz?
What is the v if ƛ = 3 m and f = 10 Hz?
What is the ƛ if v = 345 m/s and f = 790 Hz?
What is the ƛ if v = 345 m/s and f = 790 Hz?
What is the f if v = 345 m/s and ƛ = 0.25 m?
What is the f if v = 345 m/s and ƛ = 0.25 m?
Joe the whistle maker knows that the maximum volume for a whistle will occur if the length of the whistle is exactly ¼ of the wavelength. If Joe must make a whistle that plays at a pitch of 320 Hz, how long will the whistle be?
Joe the whistle maker knows that the maximum volume for a whistle will occur if the length of the whistle is exactly ¼ of the wavelength. If Joe must make a whistle that plays at a pitch of 320 Hz, how long will the whistle be?
How long is the wavelength of KAJA radio whose broadcast frequency is 97.1 MHz?
How long is the wavelength of KAJA radio whose broadcast frequency is 97.1 MHz?
Using the velocity of sound at 340 m/s and given the frequencies of a piano scale, compute the wavelengths of that scale.
Using the velocity of sound at 340 m/s and given the frequencies of a piano scale, compute the wavelengths of that scale.
What is the relationship of the frequencies of notes C4 and C#5?
What is the relationship of the frequencies of notes C4 and C#5?
What is the relationship of the wavelengths of notes C4 and C#5?
What is the relationship of the wavelengths of notes C4 and C#5?
What happened to the wavelength as the frequency increased between notes C4 and C#5?
What happened to the wavelength as the frequency increased between notes C4 and C#5?
Study Notes
Wave Types and Characteristics
- Transverse Wave: Features include amplitude, crest (highest point), trough (lowest point), and wavelength (distance between crests).
- Longitudinal Wave: Consists of compressions (areas where particles are close) and rarefactions (areas where particles are spaced out).
Examples of Waves
- Transverse wave examples: Water waves and light waves.
- Longitudinal wave examples: Sound waves and slinky movement.
Wave Phenomena
- Bow Wave: V-shaped wave pattern created when the wave source moves faster than the wave speed.
- Sonic Boom: A shock wave produced when an object exceeds the speed of sound, resulting in a sharp sound.
Wave Measurement
- Wavelength Definition: Distance between identical points on consecutive waves, represented by the Greek letter lambda (ƛ).
- Speed of a wave calculated using the formula v = fƛ, where v is speed, f is frequency, and ƛ is wavelength.
Wave Behavior and Interactions
- Waves can reflect, refract, diffract, or get absorbed when encountering objects.
- Reflection: Wave bounces back.
- Refraction: Wave bends while passing through an object.
- Diffraction: Wave bends around obstacles or through openings.
- Absorption: Wave energy is taken in, reducing its amplitude.
Sound Waves and Interference
- Constructive Interference: Waves combine to produce a larger amplitude.
- Destructive Interference: Waves combine to reduce amplitude or cancel each other out.
Doppler Effect
- Describes changes in frequency as a wave source moves toward or away from an observer.
- Applies to both sound and light waves, leading to perceived frequency shifts.
Properties of Waves
- Speed of sound in air is approximately 340 m/s (660 miles per hour).
- Pitch of a sound correlates directly with frequency; louder sounds have greater amplitude.
Wave Speed in Different Materials
- Waves travel fastest in solids, slower in liquids, and slowest in gases.
Resonance
- Occurs when a periodic force matches an object's natural frequency, drastically increasing amplitude.
Harmonics in Standing Waves
- Fundamental frequency: Lowest frequency of a standing wave.
- Harmonics: Higher natural frequencies related to the fundamental frequency.
Practical Applications and Examples
- Sound perception in environments: Sound can diffract, allowing it to be heard around obstacles.
- Noise-cancellation technology: Uses destructive interference principles.
Calculations and Wavelength Relationships
- Relationships between frequency and wavelength illustrated through calculations, showing inverse relationships (when frequency increases, wavelength decreases).
- Example calculations provided for finding speed, wavelength, and frequency given specific values.
Music and Frequency Relationships
- Example of pitch relationship between musical notes: The frequency of successive notes can double, resulting in halving the wavelength.
Study Tips for Waves Test
- Focus on understanding wave types, properties, and interactions.
- Practice calculating speed, frequency, and wavelength using the provided formulas.
- Ensure familiarity with key terms and their definitions.
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Description
Prepare for your upcoming Waves test with this study guide featuring flashcards. You'll learn to draw and label transverse and longitudinal waves, including key components such as amplitude, crest, and compressions. Additionally, discover real-world examples of these wave types to enhance your understanding.
