Module 2 Unit 6 -Longitudinal waves and sounds Flashcards
1
Q
What is a sound wave ?
A
It is a pressure wave . Regions o high and low pressures are created as the sound vibrates.
2
Q
What are the human sound frequencies?
A
From 20Hz to 20000Hz.
3
Q
How are sound waves different from light waves ?
A
A sound wave is produced by an oscillating object while a light is not. A sound wave is a mechanical wave (i .e that it needs a medium )it is not capable of traveling through a vacuum whereas a light can travel through a vacuum.
4
Q
Sound moves faster in ….
A
Solids
5
Q
Sounds move slower in …
A
Gases
6
Q
Why is wave speed in solids faster than liquids?
A
Density of solids is higher that of liquids which means that the particles are closer together
7
Q
Sound can be transmitted more easily and quickly in…
A
Hotter substances
