1) A power plant's marginal fuel cost is the rate of shift in fuel cost relative to produced power. (Is that true or false?)
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1) A power plant's marginal fuel cost is the rate of shift in fuel cost relative to produced power. (Is that true or false?)
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- A microwave oven has a power requirement of 1,243 W. A frozen dinner requires 5.6 min to heat on full power. (a) How much electrical energy (in kWh) is used?On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 19 min, and a 1100-W microwave oven, 4.6 min. With these power requirements, find how much it costs to use these appliances at an electrical cost of 7¢ per kWh. (Do not round your final answer. Fractional cent values are acceptable.)If you expended 1500 watts for 3 hours, how many kilowatt-hours (kWh) would that be? Enter answer as number followed by a space and then the correct units (i.e "123 Unit").
- On a particular day, the following appliances are used for the times indicated: a 1600-W coffee maker, 16 min, and a 1100-W microwave oven, 3.0 min. With these power requirements, find how much it costs to use these appliances at an electrical cost of 6 per kWh. (Do not round your final answer. Fractional cent values areAn 1800-Watt hair dryer is used for 15.0 minutes. How much energy was used in kilo-calories (food calories)? (Note that 1 kilo-calorie = 4184 J)Water flows over a waterfall that is 20.0 m high at the rate of 4.0 x 104 kg/s. If this water powers an electric generator with a 40.0% efficiency, how many watts of electric power can be supplied? Give you answer in MW (1 megawatt = 1x10' W). 3,136,000