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Sound Intensity quiz #2

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  • Which factor can affect the speed of sound underwater?
    The temperature and density of the water can affect the speed of sound underwater.
  • If air is often the medium for sound, what property of air affects the speed of sound?
    The temperature and density of air affect the speed of sound.
  • What would cause a sound to shatter glass?
    A sound at the resonant frequency of the glass, with sufficient amplitude, can shatter glass.
  • To what is pitch related in a sound wave?
    Pitch is related to the frequency of a sound wave.
  • What is the difference between high amplitude and low amplitude sound waves?
    High amplitude sound waves are louder, while low amplitude sound waves are softer.
  • What part of a musical instrument amplifies sound waves?
    The body or sound box of a musical instrument amplifies sound waves.
  • Why do you not hear and see a firework at the exact same moment?
    You do not hear and see a firework at the same moment because light travels much faster than sound.
  • What determines the pitch of a sound wave?
    The frequency of the sound wave determines its pitch.
  • What determines the pitch of a sound?
    The pitch of a sound is determined by its frequency.
  • When does a supersonic aircraft make a sonic boom?
    A supersonic aircraft makes a sonic boom when it travels faster than the speed of sound, creating a shock wave.
  • What determines the pitch of sound?
    The frequency of the sound wave determines its pitch.
  • How is frequency related to pitch?
    Higher frequency corresponds to higher pitch, and lower frequency to lower pitch.
  • How does an increase in amplitude affect sound and light waves?
    An increase in amplitude makes sound waves louder and light waves brighter.
  • Is the statement 'sound travels faster in air than in water' true or false?
    False. Sound travels faster in water than in air.
  • As the frequency of a sound wave increases, what happens to its pitch?
    As the frequency increases, the pitch of the sound increases.
  • Which factor does not increase the velocity of a sound wave in air: increasing temperature, increasing density, or decreasing humidity?
    Increasing the density of air would not increase the velocity of a sound wave; it would decrease it.
  • What determines the loudness of a sound wave?
    The amplitude of the sound wave determines its loudness.
  • What results when sound waves reflect from a hard surface?
    When sound waves reflect from a hard surface, an echo is produced.
  • What is created when an object travels faster than the speed of sound?
    A sonic boom is created when an object travels faster than the speed of sound.
  • Which form of energy travels by vibrating particles of air?
    Sound energy travels by vibrating particles of air.
  • How is sound produced?
    Sound is produced by vibrating objects that cause the surrounding medium to vibrate.
  • How does cooler air above a lake affect the movement of sound at night?
    Cooler air above a lake can cause sound to bend or refract, affecting how far it travels.
  • Louder sounds are caused by vibrations with which characteristic?
    Louder sounds are caused by vibrations with greater amplitude.
  • What will most likely happen if a sound wave moves from air through a solid?
    The sound wave will travel faster and may become louder as it moves through the solid.
  • When a guitar string is plucked, how is the sound wave formed and transmitted?
    Plucking a guitar string causes it to vibrate, producing sound waves that travel through the air.
  • What type of wall would make the best soundproofing for a room?
    A thick, dense wall with sound-absorbing materials would make the best soundproofing.
  • What is an example of energy being transferred by sound waves?
    Hearing music from a speaker is an example of energy being transferred by sound waves.
  • What event leads to the production of sound?
    The vibration of an object leads to the production of sound.
  • Decibel meters can be used to measure which property of sound?
    Decibel meters measure the intensity level (loudness) of sound.
  • Why do we hear echoes?
    We hear echoes because sound waves reflect off surfaces and return to our ears.
  • What term refers to the act of increasing something; in the case of sound, making it louder?
    Amplification refers to increasing the loudness of sound.
  • If you wanted to feel pressure waves in your body, what would you need?
    You would need a sound of very high intensity (loudness), possibly above the threshold of hearing or even outside the audible range.
  • Which person will most likely hear the loudest sound: one closer to the source or farther away?
    The person closer to the sound source will hear the loudest sound.
  • An opera singer breaks a crystal glass with her voice. What best explains why this occurs?
    The singer produces a sound at the glass's resonant frequency with sufficient amplitude, causing it to vibrate and break.
  • What property unique to sound waves can break glass?
    Resonance at the natural frequency of the glass, combined with high amplitude, can break glass.
  • Which type of vibration is likely to produce a high-pitched sound?
    Rapid (high-frequency) vibrations produce high-pitched sounds.
  • What medium is used to create sound in a piano?
    In a piano, sound is created by vibrating strings, which then transmit vibrations to the soundboard and air.
  • Sound travels in waves. The higher the waves (the greater the amplitude), the ______ the sound.
    The higher the waves (the greater the amplitude), the louder the sound.
  • What is the maximum vibration of a sound wave that is associated with loudness?
    The maximum vibration associated with loudness is the amplitude of the sound wave.
  • Why do we hear echoes?
    We hear echoes because sound waves reflect off surfaces and return to our ears.