Sound Flashcards
What is the formula to calculate wave speed?
Wave speed = frequency × wavelength
Calculate the frequency of a water wave with a speed of 12 m/s and a wavelength of 6 m.
2 Hz
Calculate the frequency of a sound wave with a speed of 1500 m/s and a wavelength of 6 km.
250 Hz
Calculate the frequency of a sound wave with a speed of 330 m/s and a wavelength of 1.10 m.
300 Hz
Calculate the speed of a wave with a frequency of 2 MHz and a wavelength of 80 m.
160,000 m/s
Calculate the speed of a wave with a frequency of 50 Hz and a wavelength of 4 m.
200 m/s
True or False: The speed of a wave depends on its frequency and wavelength.
True
What does the loudness of a sound depend on?
Amplitude
What is the decibel scale used for?
Measuring sound intensity
Fill in the blank: We hear sounds because our _______ vibrates.
ear drum
What are vibrations caused by?
Sound waves
Describe how sound travels through different mediums.
Sound travels as vibrations through substances.
What is noise often described as?
Unpleasant sound
List ways to reduce noise in the home.
- Use carpets
- Install soundproofing
- Use quieter appliances
What is a possible consequence of excessive noise exposure?
Hearing damage
What happens to sound in a vacuum?
It cannot travel
What is the relationship between frequency and amplitude in sound waves?
Frequency determines pitch; amplitude determines loudness.
What is the impact of traffic and planes flying overhead categorized as?
Noise pollution
What is the main source of sound energy?
Vibrations
True or False: All sounds are caused by vibrations.
True
