1. Day 65 Topic 8: Current, Voltage and Resistance Electric Costs

2. 3 rd Quarter Today (65): 2 HW considered done, Classwork experience, MiniQuiz. Learn about Costs 1 More New Learning Day Left. All But 2A: Mini Lab on School. 2A: Q3 Review Q3 Review Day 67 3/25, 3/26. 2A: Exam Q3 Exam Day 68 3/27, 3/30. 2A: Mini Lab Brunch of Champions Day 69 3/31, 4/1

3. Q3 Exam Topics Gravitation/Attraction due to Mass Charge ideas, The atom, charging. Charge Separation (ideas and pictures) Electric Force: Amount and Direction Electric Field: Math Electric Field: Diagrams Circuit basics (pics, high/low, ideas) Volts, Amps, Ohms: Math Volts, Amps, Ohms: Ideas and relationships. Graphs Power, Energy. Ohmic vs Non-Ohmic. All But 2A: KwHr, electric cost.

4. HW… What needs fixing?

7. CW: Time: 12 Minutes alone, 12 minutes with group. 1 st half: Physics Formula Sheet only. 2 nd half: Notebook to table page, only. Idea: Preparation for exam conditions

8. Fresh page, lets go over it

11. MiniQuiz 6 minutes. Formula Sheet Only

12. Last Part: Energy Costs

13. Idea: Kw is a unit of Power, KwHr is a unit of Energy. KwHr times the rate gives the total cost.

14. What is a KwHr really? Kw*Hr

15. Example: A lamp (100 watts) is on for a week. How many KwHr is that?

16. Example: A lamp (100 watts) is on for a week. If BGE charges 20 cents for 1KwHr, how much did that cost you for the week?

17. Lets see: A space heater (1500 w) is on for a month every night (7 hours). A) How many KwHr is that for the month? B) How much did it cost if you pay 14 cents per KwHr?