Lecture 8

# Lecture 8 - Physics 040B/001-S08 Review Chap 15:1-5...

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April 29, 2008 Physics 40B Lecture 8 1 Physics 040B/001-S08 Chap. 15:1-5 Periodic Mechanical Waves Review Continuity Equation for Streamline ﬂow of incompressible ﬂuids: A 1 v 1 = A 2 v 2 Volume Flow Rate (m 3 /s) = A v At any two points along streamline p 1 + " gy 1 + 1 2 v 1 2 = p 2 + gy 2 + 1 2 v 2 2 or p + gy + 1 2 v 2 = constant along streamline Bernoulli’s Equation:

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April 29, 2008 Physics 40B Lecture 8 2 Mechanical Waves Waves as means of propagation of energy and momentum without propagation of matter Requires medium to propagate in which has restoring force and inertial mass Electromagnetic waves are different; propagate in vacuum Examples of Mechanical Waves Water waves Seismic Waves Sound Waves Waves on wire, rope, spring, in solids Moving or traveling waves are propagating disturbances (“wiggles”) in medium
April 29, 2008 Physics 40B Lecture 8 3 Types of Waves Transverse (in solids): Matter moves perpendicular to propagation direction (crests & troughs) Longitudinal (in ﬂuids/solids): Matter moves parallel to propagation direction (compression & rareﬁcation) Surface Waves in Liquid: transverse & longitudinal motion of particles Have deﬁnite velocity (speed) of propagation that depends on medium

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## This note was uploaded on 06/18/2008 for the course PHYS 40c taught by Professor Allenzych during the Spring '08 term at UC Riverside.

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Lecture 8 - Physics 040B/001-S08 Review Chap 15:1-5...

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