The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the oven is used for a total of 15.0 hours during one month, to the nearest hundredth of a megajoule, how much thermal energy was produced?

asked by Julia

11 years ago

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1 answer

Q=0.75V²t/R=
=0.75•120²•15•3600/144=4050000 J = 4.05 MJ

answered by Elena

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Question

The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the oven is used for a total of 15.0 hours during one month, to the nearest hundredth of a megajoule, how much thermal energy was produced?

1 answer

Q=0.75V²t/R=
=0.75•120²•15•3600/144=4050000 J = 4.05 MJ

Elena · Answer

Q=0.75V²t/R= =0.75•120²•15•3600/144=4050000 J = 4.05 MJ