10 Sound Flashcards
1
Q
Sound
A
travel by vibration
travel through vacuum (longitudinal wave)
2
Q
Compression
A
high pressure and molecules are close together
3
Q
Rarefaction
A
Low pressure and molecules are further apart
4
Q
Loud sound
A
High amplitude
5
Q
Quiet sound
A
Low amplitude
6
Q
High pitch
A
High frequency
7
Q
Low pitch
A
Low frequency
8
Q
Speed of sound
A
Solid : 3000-5000 m/s
Liquid : 1500-2000 m/s
Gas : 300-340 m/s
9
Q
Sound frequency
A
Infrasound : < 20 HZ
Human hearing range : 20-20,000 Hz
Ultrasound : > 20,000 Hz
10
Q
finding speed of sound
A
separation between 2 students / time taken from see light until hear sound
11
Q
reflection of sound
A
- frequency stays the same *
solid :
highest speed
longest wavelength
largest angle
gas :
lowest speed
shortest wavelength
smallest angle
