Sound Flashcards
(26 cards)
What does the law of conservation of energy
Energy cannot be created or destroyed but may be converted from one to the next
What is sound
Sound is a form of energy produced by vibrations
What is the speed of sound in air
340m/s
Does sound travel faster in solids or liquids
Solids
Put these in order from fastest to slowest
Solids, liquids, gases
Which is faster speed of sound or light
Light
A flash of lightning was observed and exactly 6 seconds later a clap of the
Thunder was heard. How far away was the lightning
340X6=2040m=2.04km
What is an echo
An echo is a reflection of a sound
What is a disadvantage of echoes?
In halls sound can become distorted due to echoes
What is an advantage of echoes
Ships can use echoes to find the depth of sea
What is the energy that made the water bend in the experiment with the tuning fork
Kinetic
What does sound need to travel through
Medium
What can sound not travel through
A vacuum
What is the unit of sound
Decibels
How many decibels can damage your ears
> 85db
What is an ultrasound
High pitched sound
How do you find distance
Speed X Time
How do you find time
Distance divided by speed
How do you find speed
Distance divided by time
What can use high pitched sound
Dog whistles
Sound is always caused by something being made to____
Vibrate
Sound needs a —— to travel through, it cannot pass through a ——
Medium, vacuum
We see lightning before we hear thunder because ——– travels faster than —-
Light sound
Sound travels faster through —- or —– than through a —-
Solid, liquid, gas
