Homework Help: physics

Posted by Aaron on Tuesday, March 1, 2011 at 4:10pm.

The table shows the power ratings of four electrical appliances.
Fan heater 2 kW
Oven 3 kW
Kettle 2 kW
Microwave oven 0.75 kW

The kettle is used for a total of 30 minutes a day. It has an efficiency of 0.9
What is the cost of the energy wasted by the kettle each day?
1 0.6 p
2 1.0 p
3 6.0 p
4 9.0 p

please can someone post a walkthrough of the answer along with the answer please, Thanks in advance.

physics - Aaron, Tuesday, March 1, 2011 at 5:10pm
Anyone? ive got a test tomoz and i need this answering

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