• Answers:

    1.112.5J                                                                                                                                                                                                                             2. a. 4,878,000 kJ           b. 1.626 x 10 8   J/day                  c.  $101.49

    3.  a 4,320,000 J             b. 864,000 J                                c. 1.2 kwh
    4. a. 288,000,000 J     / 80 kWh                  b. $6.06
    5.  600 = 516,000 kcal/yr            1880 = 1,616,800 kcal/yr
    6. a. 23,838 kWh/yr       b. $1,966.64/yr     c. 20,500,680 kcal/yr      d. 81,049,200 BTUs/yr
    7. a 584 kWh/yr   b. 87.6 kWh/yr    c. $5.58 /yr  bulb paid for in a little over 3 years
    8. a 88.64 gal/yr    b. 2,836,363.64 kcal/yr     
    9. a 8900 BTUs        b. 9600 BTUs