A steam iron draws 6.0 A from a 120-V line.(a) How many joules of internal energy are produced in 20 min? (b)How much does it cost ,at $0.80/kWh, to run the steam iron for 20 min?
ddaeeric
Answered question
2021-04-02
Answer & Explanation
komunidadO
Skilled2021-04-04Added 86 answers
Internal energy is used to disperse all of the electrical power. Power is the amount of energy lost per second. Therefore, we must first determine the Power that equals .
You multiply power by the length of time the appliance is in use to calculate the energy lost. It has to be in seconds.
The power from the first half must be converted to kW by dividing by 1000, multiplied by the number of hours the iron is in use, which is.3333, and then multiplied by the price per kWh to get the cost of using the iron for 20 minutes.
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