Green handwritten course syllabus education presentation
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This document discusses electricity and provides information about calculating the cost of electrical power. It defines key terms like energy, power, joules, watts, and kilowatts. It explains that electricity is sold in kilowatt-hours and provides formulas for calculating energy use and power. The document also includes important conversions between units like cents to rands, joules to kilowatt-hours, watts to kilowatts, and hours to minutes. Finally, it discusses ways to save electricity such as using solar panels and fluorescent lightbulbs.
Green handwritten course syllabus education presentation
- 1. cost of electrical power MISS GLADNESS'S CLASS
- 3. LIGHTS ON!! LIGHTS ON!! LIGHTS ON!!
- 4. What do you know about electricity???
- 5. learning outcomes:. Learners should be able to understand and define concepts related to this topic. Learners should be able to calculate the cost of power. Learners must be able to list ways of saving electricity.
- 7. ELECTRICITY IS THE RATE AT WHICH ENERGY IS PROVIDED. THERE ARE UNITS PROVIDED FOR TERMS THAT ARE RELATED TO ELECTRICITY: Energy is the capacity for doing work.
- 8. ENERGY - JOULES (J) TIME-SECONDS(S) POWER(TOEE)-WATT(W) THE AMOUNT OF ENERFY TRANSFERRED - KILOWATTS(kW)
- 9. In different households an electricity meter is used to measure the energy usage. Consumers of electricity often pay for the number of kilowatts(the amount of energy transferred) they used for a specific period. The unit in which electricity is sold is in kWh. The below formulas can be used to do calculations: Energy use= Kilowatt X Number of hours used. Power=W-energy (J)/t- time(s).
- 10. IMPORTANT CONVERSIONS. Cents to Rands. (Division) 100c=R1 thus: 143c/R100=? Rands to cents (multiply). R1=100c thus: R19x100c=?
- 11. Important conversions cont... Joules to KIlojoules(Multiplication). 1 Joule=0,001kJ thus: 33000JX0,001kJ=? Kilojoules to joules (Division). 0,001kj=1 Joule thus: 33Kj x 0,001=?
- 12. Important converstions cont... Watts(W) to kiloWatts(kW)(Division). 1000W=1kW Thus: 284000W/1000=? kiloWatts to Watts(Multiplication). 1kW=1000W Thus: 284kW x 1000=?
- 13. Important conversions continued... 1 minute=60 seconds 1 hour=60 minutes thus in order to change seconds to minutes we divide the number of seconds by 60. and in order t change minutes to seconds we multiply the number of minutes by 60. e.g 120s to minutes = 120/60=? 2 minutes to seconds = 2x60=?
- 14. IMPORTANT CONVERSIONS CONTINUED.... HOURS TO MINUTES In order to convert minutes to hours we divide minutes by 60. Minutes to hours. in order to change hours to minutes we multiple the hours by 60. N:B Ex 22 question 1.4
- 15. HOW DO YOU THINK WE CAN SAVE ELECTRICITY?
- 16. Using solar panels to covert solar energy into electrical energy. Using flauroscent lightbulbs/ energy saving lightbulbs to save energy. what is the difference between flauroscent light bulbs and normal light bulbs? questions??? solar panels can be used for geysers,pumps and electric motors.
- 18. The end!! Thank you for attending.