Question

Energy Efficiency:

The energy consumption of a device is 500 kilowatt-hours. Convert this to joules
and then to calories. (1 kWh = 3.6 x 10^6 J, 1 J = 0.239006 calories)

Answer 1

To convert 500 kilowatt-hours to joules, multiply 500 by 3.6 x 10^6. To convert the energy in joules to calories, multiply the joules by 0.239006.

Step-by-step explanation:

To convert the energy consumption from kilowatt-hours to joules, we can use the conversion factor 1 kilowatt-hour = 3.6 x 10^6 joules.

So, to convert 500 kilowatt-hours to joules, we multiply 500 by 3.6 x 10^6:

500 kilowatt-hours x 3.6 x 10^6 joules/kilowatt-hour

= 1,800 x 10^6 joules

= 1.8 x 10^9 joules

Now, to convert the energy in joules to calories, we can use the conversion factor 1 joule = 0.239006 calories.

So, to convert 1.8 x 10^9 joules to calories, we multiply 1.8 x 10^9 by 0.239006:

1.8 x 10^9 joules x 0.239006 calories/joule

= 4.3072 x 10^8 calories