Density changes - PowerPoint PPT Presentation

Winds

Winds. What is wind?. The movement of air in a horizontal direction. What causes wind?. The uneven heating of the Earth causes differences in air pressure. Why does this happen?. The Sun’s energy is more concentrated at the Equator and spread out more over the poles.

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PHYS16 – Lecture 40

PHYS16 – Lecture 40. Ch. 17 Sound. Ch. 17 Sound. Sound Longitudinal Pressure Waves Sound Velocity Sound Reflection and Standing Waves Intensity Beats Doppler. Sound Waves = Longitudinal Wave. Sound is a longitudinal pressure wave Needs medium to propagate

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283 views • 14 slides

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