Conversion: Joules to kWh

  • #1
To monitor the electrical energy usage of a room in a hotel, the 'Carbon Cops' install some measuring instruments. These gather data over 24 hrs as follows:
- Total number of joules of energy used=20000000J (20MJ)
- Voltage supplied = 240 V

Convert the number of joules into kWh.
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,090
4
Welcome to PF.

What are watts?

Joules/s ... so how many seconds in an hour?

That's watts/hour, so how many kw/h ?
 

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