SOUND ENERGY

Multiple Choice

Which of the following is not a source of sound?

• Water
• Light
• Air
• Metal

Multiple Choice

Sound is produced as a result of

• Refraction
• Vibrations
• Absorption
• Reflection

Multiple Choice

What happens to the voice box when a person speaks?

• The vocal cords become stiff
• The voice box expands
• The larynx moves to the stomach
• The voice box vibrates as air passes through the vocal cords.

Multiple Choice

Sound wave can be defined as

• A longitudinal wave that transfers energy through oscillations of particles in a medium.
• A stationary wave that does not propagate
• A wave that only travels through solids
• A transverse wave that travels through a vacuum

Multiple Choice

Sound cannot travel through vacuum due to

• Presence of particles
• High density
• Low speed
• Absence of particles to vibrate

Multiple Choice

The amplitude of a sound wave is

• The frequency of the sound wave
• The wavelength of the sound wave
• The measure of the maximum disturbance in the medium caused by the wave.
• The speed of the sound wave

Multiple Choice

The distance between two consecutive peaks in a sound wave is the

• amplitude
• velocity
• wavelength
• frequency

Multiple Choice

The time taken to complete a wave cycle is known as

• amplitude
• frequency
• period
• wavelength

Multiple Choice

The intensity or loudness of sound wave is determined by

• Frequency
• Wavelength
• Velocity
• Amplitude

Multiple Choice

Which of the following is the correct relationship between the wavelength, velocity and frequency of sound waves

• velocity = wavelength + frequency
• velocity = frequency - wavelength
• velocity = frequency x wavelength
• velocity = wavelength / frequency

Multiple Choice

The velocity of sound is expressed in

• km/h
• miles/h
• m/s
• ft/s

Multiple Choice

A guitar string vibrates at a frequency of 440 Hz. If the speed of sound in air is 343 ms^-1,

• what is the wavelength of the sound wave produced by the guitar string?

• 2. 1.234 meters
• 1. 0.345 meters
• 0.7795 meters
• 3. 2.567 meters

Multiple Select

The speed of sound depends on the ............................. of the medium it travels through.

Choose all that apply.

• temperature
• density

• pressure

• elasticity

Multiple Choice

Sound travels faster in

• solids
• gases
• vacuum
• liquids

Multiple Choice

Sound travels faster in solid mediums because

• Particles in solids are farther apart
• Particles in solids are more elast

• Solids have less density than liquids
• Sound waves are absorbed by solids

Multiple Choice

The speed of sound in a gas medium is about

• 500 ms^-1

• 400 ms^-1

• 330 ms^-1

• 256 ms^-1

Multiple Choice

When light hits a surface, ..........................

• the light can be refracted, absorbed, or scattered
• the light can be reflected, refracted, or absorbed
• the light can be absorbed, transmitted, or reflected
• the light can be transmitted, absorbed, or scattered

Multiple Choice

Reflection of sound causes

• Echoes and reverberation
• Absorption of sound
• Reflection of light
• Transmission of sound

Multiple Choice

The difference between reverberation and echo is that

• Reverberation is the persistence of sound in a particular space due to multiple reflections, while an echo is a distinct repetition of sound caused by the reflection of sound waves off a surface.
• Reverberation is caused by sound waves traveling through a vacuum, while an echo occurs in a medium with air
• Reverberation is a result of sound waves bouncing off a single surface, while an echo involves multiple surfaces
• Reverberation is a natural phenomenon, while an echo is artificially created

Multiple Choice

Diffusion in the context of sound refers to the

• spreading of sound waves in different directions to create a more balanced sound field.

• absorption of sound waves by materials

• amplification of sound waves in a specific direction

• process of converting sound waves into light waves

Multiple Choice

Which phenomenon is at play as sound wave changes in velocity, wavelength and direction

• Refraction
• Absorption
• Diffraction
• Reflection

Multiple Choice

Refraction of sound is the

• amplification of sound waves
• absorption of sound waves
• scattering of sound waves in different directions

• change in direction of sound waves

Multiple Choice

Echo of sound is useful in

• detecting colors
• predicting weather
• measuring weight
• determining distance

Multiple Choice

When light scatters in different directions upon encountering irregular surfaces, ........................ is said to have occurred

• Diffusion

• Dispersion

• Refraction

• Reflection

Multiple Choice

Which of the following is not a characteristic feature of sound?

• pitch

• loudness

• noise

• timbre

Multiple Choice

The pitch of sound is the

• amplitude of the wave of the sound

• wavelength of the wave of the sound

• frequency of vibration per second produced by the vibrating source.

• velocity of the s

Multiple Choice

The combination of harmonics and overtones of a vibrating source is known as the

• timbre
• pitch
• resonance
• tempo

Multiple Choice

A sound of good quality that contains regular pitch, loudness, and timber is referred to as

• Frequency
• Noise
• Note

• Melody

Multiple Choice

The difference between musical notes and noise

• Musical notes and noise are both random sounds
• Musical notes are organized sounds with specific frequencies and patterns, while noise is chaotic and lacks musical structure.
• Musical notes have no specific frequencies
• Noise is always pleasant to listen to

Multiple Choice

The doppler effect is a phenomenon that describes

• Change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source.
• Change in amplitude of a wave
• Change in temperature of a medium
• Change in speed of light in a vacuum

Multiple Choice

If the source of the wave is moving away from the observer, the frequency of the wave appears to

• increase
• double
• decrease
• stay the same

Multiple Choice

How do bats apply the doppler effect?

• Bats apply the Doppler effect by emitting sound waves only when stationary.
• Bats apply the Doppler effect by emitting high-frequency sound waves and listening for the echoes that bounce back, allowing them to determine the speed and direction of objects.
• Bats apply the Doppler effect by using visual cues instead of sound waves.
• Bats apply the Doppler effect by emitting low-frequency sound waves.

Multiple Choice

The two major functions of the human ears are

• Smelling and tasting
• Seeing and touching
• Breathing and swallowing
• Hearing and balance

Multiple Choice

The part of the ear that collects and directs sound waves is the

• cochlea

• tympanum

• pinna

• waves and directs

Multiple Choice

The main part of the ear for hearing is the

• pinna

• tympanic membrane
• anvil

• cochlea

Multiple Choice

The inner part of the ear concerned with balance is the

• auditory nerve

• cochlea

• semi-circular canals

Multiple Choice

The auditory nerve in the ear is responsible for

• regulating body temperature
• controlling blood pressure
• transmitting sound signals from the cochlea to the brain
• producing tears

Multiple Choice

The auditory ossicles of the ear responsible for

• Detecting light waves in the inner ear
• Regulating blood flow to the ear canal
• Producing earwax for protection
• Amplifying and transmitting sound vibrations from the eardrum to the inner ear