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Lecture Demonstrations Martin Simon Gueorgui Gueorgiev Krysten Cunnigham

Lecture Demonstrations Martin Simon Gueorgui Gueorgiev Krysten Cunnigham http://www.physics.ucla.edu/demoweb/. demowebimagesastronaut.mov. Is this true? I have read in books that when you get into space there is no gravity. Liquid Nitrogen melting temperature:

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Lecture Demonstrations Martin Simon Gueorgui Gueorgiev Krysten Cunnigham

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  1. Lecture Demonstrations Martin Simon Gueorgui Gueorgiev Krysten Cunnigham http://www.physics.ucla.edu/demoweb/

  2. \demoweb\images\astronaut.mov

  3. Is this true? I have read in books that when you get into space there is no gravity.

  4. Liquid Nitrogen • melting temperature: 77K, -196C, -320 F • density 1.3g/L

  5. Gas Atmosphere Boiling point Melt Nitrogen 78.1% 77 K, -196 C, -320 F 63 K Oxygen 20.9% 90 K, -183 C, -297 F 54 K Argon 0.9% 87 K, -186 C, -303 F 84 K Carbon Dioxide 0.038% 195 K,-78 C, -108 F Helium 4.2 K, -269 C, -452F 0.95 K Water varies 373 K, 100 C, 212 F 273 K Heat of Fusion (melting) Heat of Vaporization Water 335 kj/kg 2260 kj/kg Nitrogen 25.5 kj/kg 201 kj/kg Density Nitrogen 1.3 g/l Oxygen 1.4 g/l Carbon Dioxide 2.0 g/l Helium 0.2 g/l

  6. Doppler shifts • doppler horn • ephysics\physlets\doppler_shift.htm

  7. Ping-Pong Cannon 1 atm = 760 mmHg (Torr) = 14.7 lb/in2 1 lb = 4.448 N 1 m = 39.37 in speed of sound = 343 m/s at 200C ping-pong ball: diameter = 1.45 in mass = 1 g = 0.001 kg tube length = 68 in with P = 14.7 lb/in2 W = F*d = (14.7 lb/in2)(p * 0.722 in2)(68 in) = 1628 lb in = 183 J W = DK = ½ * m * v2 or 183 = ½ * 0.001 * v2 v = 604 m/s

  8. Singing Rod Standing Waves

  9. Driven Damped Harmonic Oscillator • Equation: • Solution:

  10. Capacitor • Two Conductors (ie metal plates) separated by an insulator (example, air) stores charge and energy

  11. Large Capacitor 400 µF 6 kV 7200 joules Defibrillator Capacitor 70 µF 5 kV 875 joules 200 joules to the body in 2 ms = 100 kW 20 amps at 5 kV for 2 ms 20 mA can cause muscle contractions 70 mA across torso – heart goes into ventricular fibrillation higher currents cause heart to stop and usually restart Dry skin resistance 10,000—1,000,000 Ohms Wet skin 1,000 Ohms Wet skin in contact with 120 V power line-- 120/1000 = 120 mA

  12. Tesla Picture

  13. ePhysics – UCLA’s online electronic physics demonstrations • Webpage - http://ephysics.physics.ucla.edu/ • ephysics\physlets\1.1\elenses_and_mirrors.htm

  14. Sulfur Hexafluoride • Molecular weight 146g/mol • 5 x density of air • Helium • Molecular weight 4g/mol • 1/7 density of air

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