# L4_20.pptx - Topics for Today Third exam is today Third...

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• thisisbunk10
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Topics for Today Third exam is today. Third exam will cover chapters 11-15. Review (?) Standing waves and resonance (16-7) Sound waves and speed of sound (17-1)

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What is ? A) Why did you write the 6 backwards? B) y/t, the ’s cancel C) Take it away, I hate calculus D) The partial derivative of y with respect to t Math Question
What happens when two waves traveling in opposite directions interfere? Standing Waves

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Sinusoidal waves with the same frequency and amplitude traveling in opposite directions. The sum of sines is Use and Then and Find Result is not a traveling wave! Wave has a fixed spatial dependence = a “standing wave”. Standing Waves
Wave All points have the same time dependence = Amplitude varies with x as Positions where , with n = integer, produce These are called “nodes”, “Anti-nodes” are locations of largest oscillations, Anti-nodes are halfway between nodes.

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• Spring '12
• Unkown
• Physics, Wavelength, representative, Standing wave, 5 seconds, 1609 meters

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