Forms of Energy & Transformations Energy makes things happen!! Energy is neither created nor destroyed, it is constant.
I. NUCLEAR ENERGY 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! *
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
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
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
III. POTENTIAL: A. Gravitational: Water Cycle Water cycle: precipitation-rain evaporation-sun condensation-cloud precipitation-rain
III. POTENTIAL: B. Chemical: Natural Resources Harnessing fossil fuels and natural resources: Oil Coal Natural Gas Wood Food
III. POTENTIAL: C. Elastic: Spring/Stretch Rubber Plastic poppers Super balls, Air-zooka Rubber bands Screaming Balloons Springs Slinky
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
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
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
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
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.
Do you know the energy transformations in FIREWORKS?
FIREWORKS Answer Going up: Chemical > Trans. KE > Grav. PE > Trans. KE + heat Exploding: Chemical > Light + Sound + Heat