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Forms of Energy & Transformations

Forms of Energy & Transformations. Energy makes things happen!! Energy is neither created nor destroyed, it is constant. A. Fission - - - Split apart -- - -- Radioactive uranium atoms can break apart –fission. If fission happens in a billionth of a second you get an ATOMIC BOMB.

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Forms of Energy & Transformations

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  1. Forms of Energy & Transformations Energy makes things happen!! Energy is neither created nor destroyed, it is constant.

  2. A. Fission - - - Split apart -- - -- Radioactive uranium atoms can break apart –fission. If fission happens in a billionth of a second you get an ATOMIC BOMB. B. Fusion Joining together Deuterium+Lithium= * (heat + light) so D + L = energy SUN Scientists can’t control this yet; it’s hard to build a star! * I. NUCLEAR ENERGY

  3. II. KINETIC ENERGY: MOTION A. Translational: Motion from Point A to Point B Examples: toy car or rolling ball... B. Rotational: Spin Examples: toy top C. Tortional: Twist Examples: twisted playground swing, anything that twists D. Vibrational: Shake (short movements) Examples: Rattleback, Slinky

  4. III. POTENTIAL ENERGY: STORED (waiting to happen) Outline • A. Gravitational • HYDROPOWER, WALKING DUCK • WATER CYCLE/ALPINE ECOSYSTEM • B. Chemical • EXPLODING CANNISTER/ALCOHOL BURNER, BATTERY • C. Elastic SPRINGS RUBBER BANDS

  5. III. POTENTIAL: A. Gravitational: Hydropower • Pull of gravity makes things move downhill. • Reservoir: water runs downhill to turn the turbine to turn the generator to make electricity. • PE=mgh

  6. III. POTENTIAL: A. Gravitational: Water Cycle • Water cycle: • precipitation-rain • evaporation-sun • condensation-cloud • precipitation-rain

  7. III. POTENTIAL: B. Chemical: Natural Resources Harnessing fossil fuels and natural resources: • Oil • Coal • Natural Gas • Wood • Food

  8. III. POTENTIAL: C. Elastic: Spring/Stretch • Rubber • Plastic poppers • Super balls, Air-zooka • Rubber bands • Screaming Balloons • Springs • Slinky

  9. IV. LIGHT ENERGY (Electromagnetic Energy) • A.Lightning (Tesla Coil) 1. Air inside the cloud rubs, makes static electricity.. Negative charges settle in cloud. Negative charges move to positive > lightning. B.Light Sticks • C.Laser – very focused ray of light Surgery; Pointers D. Solar cells

  10. V. SOUND ENERGY • A. THUNDER • When lightning strikes, it heats and forces air molecules outward. B.SONIC BOOM C. EXAMPLES: Cracker Blaster, Solar Tunes, Thunder Drum

  11. VI. HEAT ENERGY: A. The Heat Tax Heat comes from every energy conversion !!! • Nothing is for nothing! • Always pay “heat taxes.” EXAMPLES: Solar thermal Wind energy Friction = motion + heat Thermoelelectric Converter Heat Engines Radiometer

  12. VI. HEAT ENERGY: B. Geothermal • “Earth” + “heat” • Dig a hole: Temp. Increases as you go. • Water gets in the cracks of the earth; turns to steam: - steam heat - geysers (Old Faithful) - Geysers Plant in CA

  13. Examples of HEAT ENERGY: C. Solar Thermal • The sun’s heat: Car on cold day • Wind Energy: 1. Sun heats the air unevenly. 2. Warm air rises, makes wind.Wind has translational KE.

  14. Do you know the energy transformations in FIREWORKS?

  15. FIREWORKS Answer Going up: Chemical > Trans. KE > Grav. PE > Trans. KE + heat Exploding: Chemical > Light + Sound + Heat

  16. This concludes our energy notes.

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