Physics Waves Flashcards
Define compression and rarefaction.
The vibration that makes the sound makes the air molecules vibrate to and fro in the direction of motion of the sounds waves. This produces compressions and rarefactions. These are regions of high and low pressure, so sound is a a pressure wave.
State the frequency of an ultra-sound?
Above 20,000 Hz
The particles in a sound wave move _____ and _______.
To and fro.
The direction of vibration is the _____ direction as that of the wave.
Same
Waves with a higher frequency or larger amplitude transfer ____ energy.
More.
You can use high-frequency sounds waves to ______ a liquid for cleaning objects or to massage _______ for physiotherapy.
agitate
muscles
A microphone turns the pressure wave of sound hitting it into an ________ signal.
electrical
Low-frequency radiation, like ________ and _______ have a heating effect on the human tissue.
microwaves
infrared
High-frequency radiation, like ________ and _______ can cause cancer.
Ultraviolet
X-rays
Lower-frequency radiation can cause ____ ______.
skin cancer
A wave is a vibration that transports energy from place to place without transporting ______.
matter
In a ______ wave, the vibration is perpendicular to the direction of the travel of the wave.
transverse.
When waves combine (superpose) they can ______________
add up or cancel out.
What are the five types of wave properties?
reflection
refraction
transmission
absorption
superposition
Waves differ in the medium that they can to cannot travel through, in their ______, and how they interact with each other
Speed.
