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PHY 2053C – College Physics A Spring 2004

L21—Ch11Ch12. PHY 2053C – College Physics A Spring 2004. Motion, Forces, Energy, Heat, Waves Dr. David M. Lind Dr. Kun Yang Dr. David Van Winkle. Today: SPOT evaluations: 10:10-10:20 Recap Mini-exam#7 Review for Final Kinematics Force & acceleration Work & Energy –

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PHY 2053C – College Physics A Spring 2004

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  1. L21—Ch11Ch12 PHY 2053C – College Physics A Spring 2004 • Motion, Forces, Energy, Heat, Waves Dr. David M. Lind Dr. Kun Yang Dr. David Van Winkle • Today: • SPOTevaluations: 10:10-10:20 • Recap Mini-exam#7 • Review forFinal • Kinematics • Force & acceleration • Work & Energy – -- conservation laws • Rotational motion • Momentum, Impulse • -- conservation laws (again) • Fluids: bouyancy, lift • Heat & Thermodynamics • The final exam will be held:Wednesday, December 8 at 10:00-12:00,in 275 Fisher Lecture Hall;and will becomprehensive.

  2. Topics covered on the final • Circular motion – speed and acceleration • Work, Energy, and Forces • Moment of Inertia • Inelastic and elastic collisions • Momentum, Impulse • Circular Motion* –angular speed and linear speed, –centripetal forces • Momentum* –inelastic collision & momentum transfer – (force & momentum) • Potential and Kinetic energy* –conservation of energy and frictional forces

  3. Topics covered on the final2 • Force of Gravity • Equilibrium: conditions for… • Ideal gas law • Friction and Normal Forces* –angular speed and linear speed, –centripetal forces • Momentum* –static & kinetic friction – acceleration • Torques & Equilibrium* – net torques, tension, pivot points • Bouyancy – displacementof volume of liquid • Waves and wave motion -- definitions • Projectile motion* – kinematical equations in 2-d • Fluids* – statics (hydraulics) • Heat and Thermodynamics* – conservation of energy, calorimetry, specific heats

  4. Stay tuned... Announcements (repeat) • The final exam will be held: Wednesday, December 8 at 10:00-12:00,and is scheduledfor 275 Fisher Lecture Hall,not in our current classroom!! • The final exam will becomprehensive, Enjoy yourChristmas holiday!!

  5. Important Points from last Lecture • Simple Harmonic Oscillator is a consequence of • The Period T is • Pendulum: • Damped Oscillations: Shock absorbers:

  6. Standing Waves:Resonances on Strings A wave on a string is always being reflectedback and forth on both ends with a negative sign, which leads to standing waves --“superposition of two waves moving in opposite directions.” Nodes (“stationary points”) and Antinodes (“maximum displacement points”) • Possible wavelengths, frequencies:

  7. Resonances in a Tube • Most wind instruments use resonances in a tube. • Closed end: displacement node • Open end: displacement antinode evenharmonics can not have an antinode at the open end

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