Science Baseline Test - sound waves, water waves, and energy

IM SO CLOSE OMFG SET 15 OF 16

sound transfers

energy

the vibration that makes the sound makes

the air molecules vibrate to and fro in the direction of motion of the sound waves, producing compressions and rarefactions

compressions

regions of high pressure in a wave

rarefactions

regions of low pressure in a wave

sound is a

pressure wave

when the regions of high and low pressure interact with particles in a solid or a liquid they

exert a force on them

sound waves transfer energy in the direction of

the sound wave. if the wave has a bigger amplitude or frequency it transfers more energy

you can make sound with a … and detect it with a …

loudspeaker, microphone

a microphone

converts changes in air pressure to a changing potential difference

a loudspeaker

converts a changing potential difference to changes in air pressure

diaphragm

a flexible plate that vibrates to produce a changing potential difference, which a loudspeaker changes back into a sound when they vibrate

you can only hear frequencies up to

20,000 Hz

ultrasound

sound with a frequency above 20,000 Hz

when sound or ultrasound interacts with solids or liquids

it makes the particles in those materials vibrate, meaning you can use ultrasound to clean objects (ultrasonic cleaning)

you can use the energy in water waves to

generate electricity, waves push air through a turbine and generator to produce electricity