2nd Form Sound Flashcards
(12 cards)
What are all sounds made by?
Vibrations or oscillations
What is a compression?
Where the air pressure is higher than normal
What is a rarefaction?
Where the air pressure is lower than normal
What happened to the candle flame when the vibrating loud speaker was turned on?
The candle flickered left and right
What is a vacuum
A region of space containing no particles / atoms
Describe what happened throughout the bell jar experiment
As the air was pumped out the sound got quieter and quieter. Ben the air was let back in , it became louder
Explain the slinky demonstration
The hand pushed and pulled on the slinky left and right
In which does sound travel fastest : solid, liquid, gas
Solids
In which does sound travel slowest : solid, liquid, gas
Gas
What is the calculation to work out the speed of something ?
Speed (metres/second) = distance (metres) divided by time (seconds)
Why must a surface be smooth in order for sound to echo?
It ensures the sound goes straight back to the observer without being scattered
Why must the surface be hard in order for sound to echo?
So it doesn’t absorb the sound and muffle it like it would on a soft surface
