15_Travelling_Waves_and_Sound

# 15_Travelling_Waves_and_Sound - Review question chapter 14...

This preview shows pages 1–10. Sign up to view the full content.

1 Review question chapter 14 Page 480. problem 33 The amplitude of an oscillator decreases to 36.8%. ..

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 Traveling Waves and Sound Mechanical and Field waves Transverse and longitudinal waves Wave speed Sinusoidal waves Wave intensity Sound waves Doppler effect and shock waves
3 Traveling Waves Sound waves Doppler effect Shock waves

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
4 Mechanical and Field waves • Mechanical waves travel through a well defined medium, e.g. sound through air, ocean waves across water. • Field waves can travel through a vacuum – such as EM waves (radio, light, X-rays), and quantum waves, gravitational waves. • We are going to cover mechanical waves.
5 Two types of waves Transverse waves – medium moves perpendicular to the direction of the wave. Longitudinal waves – medium moves parallel. Transverse – ropes, water, earthquakes (S), (light) Longitudinal – sound, compression springs, earthquakes (P)

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
6 Traveling Waves • Traveling waves transfer energy from one point to another. • They travel through a medium which does not get transferred from the source to destination. Pulse Wave
7 Wave speed • The speed of the wave is a property of the medium – tension of the rope or spring, pressure of the air. • For perfect systems, the speed does not depend on the frequency or amplitude of the wave.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
8 Wave speed in a string The speed of a wave increases with the tension on the string, T s , measured in Newtons. The speed decreases with the linear density of the string, μ. where Linear density, μ , has units kg/m, and is the mass per unit length. L m
Wave speed in a string It can be shown that the speed of a wave along a string is Where T s is the tension (in N) on the string, and μ is the mass per unit length (m/L in kgm -1 ) of the string. String tension and linear density

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/28/2011 for the course PHYSICS 122 taught by Professor Bhagat during the Fall '11 term at Maryland.

### Page1 / 40

15_Travelling_Waves_and_Sound - Review question chapter 14...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online