Presentation of energy unit 6
- 2. Energy
- 4. 1:Mechanical energy 2 :Chemical energy 3:Heat energy 4:Electrical energy 5:Light energy 6:atomic energy 7:Sound energy
- 15. Example Energy in Energy Description out Electric Wok Electrical Heat Flashlight Chemical Light (in the batteries) Burning Candle Chemical Light (wax) Microwave Light Oven Heat
- 17. Appliances such as refrigerators, washing machines and dryers are also more energy efficient than they used to be. Commercial buildings include a wide variety of building types— offices, hospitals, schools, police stations, places of worship, warehouses, hotels, barber shops, libraries, shopping malls—and that’s just the beginning of the list. These different commercial activities all have unique energy needs but, as a whole, commercial buildings use more than half their energy for heating and lighting. In the manufacturing sector, the predominant energy sources are natural gas and electricity (a secondary source). Manufacturers also use other energy sources for heat, power, and electricity generation.
- 18. A fire extinguisher: used to put out fires in buildings. It has a carbon dioxide inside which does not help in burning on other hand it stops fire.
- 19. When an iron rod is heated it expands because its particles gain energy and begin to vibrate faster. But its shape remains same when it cool down
- 20. HOW MANY KINDS OF ENERGY ARE THERE? TELL ME ABOUT THE MECHANICAL ENERGY? USES OF ENERGY? EXPLAIN THE PROCESS OF BURNING? WHT DO U MEAN BY STORING OF ENERGY? THE END