If a lightbulb uses 60 watts of power. If the light bulb is run for 5 hours everyday of a 30-day month how much energy did the lightbulb use? Answer in k Wh.

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Total energy used

= 60 watts * 5 hr/day * 30 days
= 9000 watt-hours
= 9 kilowatt-hours

To calculate the energy used by the lightbulb, we need to multiply its power (in watts) by the time it has been running (in hours). Then, we can convert the result to kilowatt-hours (kWh).

Given:
Power of the lightbulb = 60 watts
Time the lightbulb runs each day = 5 hours
Number of days in a month = 30

First, let's calculate the energy used by the lightbulb each day:
Energy used per day = Power × Time = 60 watts × 5 hours = 300 watt-hours (Wh)

Next, let's calculate the total energy used by the lightbulb in a month:
Energy used per month = Energy used per day × Number of days = 300 Wh/day × 30 days = 9000 watt-hours (Wh)

To convert watt-hours to kilowatt-hours, divide the value by 1000:
Energy used per month = 9000 Wh ÷ 1000 = 9 kWh

Therefore, the lightbulb used 9 kilowatt-hours (kWh) of energy in a 30-day month.