APPH 4200 Physics of Fluids

1.!! Phasors2.! Surface Tension3.! Capillary Waves4.! Rayleigh-Taylor Instability5.! Sound6.! Organ Pipes7.! HW 4

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HW 1: Ch 7, Prob 1

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HW 2: Ch 7, Prob 2

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HW 3: Ch 7, Prob 4

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Summary

• Surface tension acts to flatten short ripples on a fluid.

• Surface tension is a restoring force that can stabilize instability.

• Sound obeys Helmholtz Equation, with the speed of sound related to the "(#P/#ρ).

• Organ pipes amplify resonant sound waves!

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