A heater has a resistance of 10 ohms and operates on 120 V. What is the power of the heater and what thermal energy is supplied by the heater in 10 seconds
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the question is very straightforward. They gave us R and V and they want us to find P. We can find it using this formula P=V^2/R = (120)^2/10 = 1440W
and to find out thermal energy we use this formula E=V^2/R multiplied by t, and we can substitute this part of the formula (V^2/R) by the previous answer 1440 since it equals to it. We will get the answer 14400J
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