1. J J E E O O P P A A D D Y Y ! ! J J E E O O P P A A D D Y Y ! ! Welcome to … Skip Rules R R R R

2. You will choose questions from the following six topic areas: CLICK TO VIEW TOPIC AREAS CLICK TO VIEW TOPIC AREAS 

3. Units What do you know about…

4. Circuits

5. What do you know about… Heating

6. What do you know about… Household/Misc.

7. UnitsCircuitsHeating 10 20 30 40 50 FINAL QUESTION FINAL QUESTION FINAL QUESTION FINAL QUESTION

8. ReturnReturn Whoops! Click here to return to the Multi-Q Game Board

9. 1:101:10 What is the unit for current? CLICK TO CHECK Units f o r 1 0 p o i n t s …

10. 1:10 Answer T h e c o r r e c t a n s w e r i s … Amperes or Amps CLICK TO PLAY AGAIN 10

11. ReturnReturn Click here to return to the Multi-Q Game Board

12. 1:201:20 What is the unit for energy? CLICK TO CHECK Units f o r 2 0 p o i n t s …

13. 1:20 Answer T h e c o r r e c t a n s w e r i s … Joules CLICK TO PLAY AGAIN 20

14. ReturnReturn Click here to return to the Multi-Q Game Board

15. 1:301:30 What is the unit for Voltage? CLICK TO CHECK Units f o r 3 0 p o i n t s …

16. 1:30 Answer T h e c o r r e c t a n s w e r i s … Volts (of course) CLICK TO PLAY AGAIN 30

17. ReturnReturn Click here to return to the Multi-Q Game Board

18. 1:401:40 What is the unit for power? CLICK TO CHECK Units f o r 4 0 p o i n t s …

19. 1:40 Answer T h e c o r r e c t a n s w e r i s … Watt CLICK TO PLAY AGAIN 40

20. ReturnReturn Click here to return to the Multi-Q Game Board

21. 1:501:50 What does the unit for power represent? And what therefore are the unit of power’s units? CLICK TO CHECK Units f o r 5 0 p o i n t s …

22. 1:50 Answer T h e c o r r e c t a n s w e r i s … Amount of energy per unit time, so it is J/s. CLICK TO PLAY AGAIN 50

23. ReturnReturn Click here to return to the Multi-Q Game Board

24. 2:102:10 What is the definition of a circuit? CLICK TO CHECK Circuits f o r 1 0 p o i n t s …

25. 2:10 Answer T h e c o r r e c t a n s w e r i s … A closed loop along which an electrical current flows CLICK TO PLAY AGAIN 10

26. ReturnReturn Click here to return to the Multi-Q Game Board

27. 2:202:20 What are the two types of circuits? CLICK TO CHECK Circuits f o r 2 0 p o i n t s …

28. 2:20 Answer T h e c o r r e c t a n s w e r i s … Series and parallel CLICK TO PLAY AGAIN 20

29. ReturnReturn Click here to return to the Multi-Q Game Board

30. 2:302:30 The diagram below shows two circuits, what type is each one? CLICK TO CHECK Circuits f o r 3 0 p o i n t s …

31. 2:30 Answer T h e c o r r e c t a n s w e r i s … CLICK TO PLAY AGAIN 30

32. ReturnReturn Click here to return to the Multi-Q Game Board

33. 2:402:40 What is the formula for Ohm’s Law? CLICK TO CHECK Circuits f o r 4 0 p o i n t s …

34. 2:40 Answer T h e c o r r e c t a n s w e r i s … V = IR CLICK TO PLAY AGAIN 40

35. ReturnReturn Click here to return to the Multi-Q Game Board

36. 2:502:50 Using Ohm’s Law, if a lightbulb in a house provides 5 Ohms of resistance, what current must be passing through it? CLICK TO CHECK Circuits f o r 5 0 p o i n t s …

37. 2:50 Answer T h e c o r r e c t a n s w e r i s … V I R I R So I = V/R. In a house, V = 110 Volts, so I = 110/5 = 22 Amps CLICK TO PLAY AGAIN 50

38. ReturnReturn Click here to return to the Multi-Q Game Board

39. 3:103:10 What is specific heat? CLICK TO CHECK Heating f o r 1 0 p o i n t s …

40. 3:10 Answer T h e c o r r e c t a n s w e r i s … The amount of energy you need to raise the temperature of a substance. CLICK TO PLAY AGAIN 10

41. ReturnReturn Click here to return to the Multi-Q Game Board

42. 3:203:20 Which has a higher specific heat, water or aluminum? CLICK TO CHECK Heating f o r 2 0 p o i n t s …

43. 3:20 Answer T h e c o r r e c t a n s w e r i s … Water (it is harder to heat up) CLICK TO PLAY AGAIN 20

44. ReturnReturn Click here to return to the Multi-Q Game Board

45. 3:303:30 CLICK TO CHECK Heating f o r 3 0 p o i n t s … What formula have we been using for calculating heat energy?

46. 3:30 Answer T h e c o r r e c t a n s w e r i s … HE = m*c*ΔT HE = heat energy m = mass of substance c = specific heat ΔT = change in temperature CLICK TO PLAY AGAIN 30

47. ReturnReturn Click here to return to the Multi-Q Game Board

48. 3:403:40 Two Heating are acting on a skydiver – a 700 N force downward due to gravity and a 100 N force upwards due to air resistance. What is her net force? CLICK TO CHECK Heating f o r 4 0 p o i n t s …

49. 3:40 Answer T h e c o r r e c t a n s w e r i s … Her net force is 600 N downwards. CLICK TO PLAY AGAIN 40

50. ReturnReturn Click here to return to the Multi-Q Game Board

51. 3:503:50 A 100 kg skydiver is being accelerated 10 m/s 2 downward due to gravity while air resistance is pushing up on her with 1000 N of force. What is the net force on her? Heating f o r 5 0 p o i n t s … CLICK TO CHECK

52. 3:50 Answer T h e c o r r e c t a n s w e r i s … The net force on her is zero. From F = ma, she has 100 * 10 = 1000 N upwards which balances the downward force. CLICK TO PLAY AGAIN 50

53. ReturnReturn Click here to return to the Multi-Q Game Board

54. 4:104:10 Name three household appliances that use a lot of energy. CLICK TO CHECK Household/Misc. f o r 1 0 p o i n t s …

55. 4:10 Answer T h e c o r r e c t a n s w e r i s … There are of course a lot of correct answers. Here’s what I came up with: Hot water heater, stove, air conditioner, baseboard heater or radiator, refrigerator CLICK TO PLAY AGAIN 10

56. ReturnReturn Click here to return to the Multi-Q Game Board

57. 4:204:20 What is a Kilowatt-hour measuring? CLICK TO CHECK Household/Misc. f o r 2 0 p o i n t s …

58. 4:20 Answer T h e c o r r e c t a n s w e r i s … Energy. A Watt is energy/time, so a watt-hour would be energy/time * time. We can cancel time and we just have energy. CLICK TO PLAY AGAIN 20

59. ReturnReturn Click here to return to the Multi-Q Game Board

60. 4:304:30 CLICK TO CHECK Household/Misc. f o r 3 0 p o i n t s … In Boston, when would you expect to have the highest energy bills and why?

61. 4:30 Answer T h e c o r r e c t a n s w e r i s … CLICK TO PLAY AGAIN 30 January and February (the coldest months). This is because it takes a lot of energy to heat a house.

62. ReturnReturn Click here to return to the Multi-Q Game Board

63. 4:404:40 What is the formula for power? CLICK TO CHECK Household/Misc. f o r 4 0 p o i n t s …

64. 4:40 Answer T h e c o r r e c t a n s w e r i s … P = IV CLICK TO PLAY AGAIN 40

65. ReturnReturn Click here to return to the Multi-Q Game Board

66. 4:504:50 Household/Misc. f o r 5 0 p o i n t s … CLICK TO CHECK When heating up water in a stove, some heat energy is lost and doesn’t go into heating the water. Where could this lost energy go? (Need two correct answers)

67. 4:50 Answer T h e c o r r e c t a n s w e r i s … Two main losses are to the air and to the pot. There is also energy lost to evaporation as the water heats up. CLICK TO PLAY AGAIN 50

68. Last Question If we try to heat 1 kg of water 10 °C, with a 400 Watt water heater, how long will it take? The specific heat of water is about 4000 J/kg/ °C. Assume no heat is lost (100% efficiency). CLICK TO CHECK T H E F I N A L Q U E S T I O N

69. Last Answer T h e c o r r e c t a n s w e r i s … The amount of energy input can be found from HE = m*c*ΔT = 1 * 4000 * 10 = 40000 J. A Watt (power) is energy/time. We can rearrange so time = energy/power. We can plug in then: time = 40000/400 = 100 seconds – between one and two minutes. CLICK TO END THE GAME