Limited access

Upgrade to access all content for this subject

Energy flow can be described by the term power. In the U.S., we measure electricity in kWh.

Compare the amount of electricity used over the course of a year by a compact fluorescent light bulb (CFL) and a light-emitting diode bulb (LED) if both are used 8 hours a day, the CFL uses 14 watts, and the LED uses 10 watts.

Hint: remember to convert to kilowatts first.

A

CFL = 40,880 kWh

LED = 29,200 kWh

B

CFL = 0.112 kWh

LED = 0.08 kWh

C

CFL = 0.014 kWh

LED =0.010 kWh

D

CFL = 40.9 kWh

LED = 29.2 kWh

E

CFL = 30 kWh

LED = 10 kWh

Select an assignment template