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10. Which of the following energy transformation happens in hydroelectric power plants? a, mechanical energy electricity b. gravitational PE kinetic enerey electricity c. kinetic enerey gravitational PE electricity d. electricity kinetic energy potential energy 11. A can opener is combination of what simple machines? a. a lever and a wedge c. a lever and an inclined plane b. a wedge and a screw d. an inclined plane and a wedge Directions: Read the statement. Write True if the statement is true and False if not. 12. Electricity is very important to us. 13. Do not turn off lights even when you are not using them because you are afraid 14. Use adapters where you can plug in your many appliances to save space in your home. 15. Cooling appliances absorb heat from the air, then bring the heat out. 16. When ironing your clothes, wait until the last piece, before setting your flat iron to low or off. 17. Try to repair appliances yourselves especially those worn-out electrical insulation 18. Solar panels are installed to absorb sunlight and generate sound. 19. Fluorescent lamps make more light and less heat. 20. In some hydropower plants, dams are built to hold the water in artificial lake.
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