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Solar panels park and wind turbines at sunset.Windmill turbines generating green energy electric.Green energy reduce carbon emissions and makes earth cleaner and more ecological.

Happy cheerful caucasian white family holding windmill toy and relax at wind farm with electric vehicle, happy family in the community with wind generators turbines, ev car, Happy family activity

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An electric generator coupled to a windmill produces an average electric power output of 15 kW . The power is used to charge a storage battery. Heat transfer from the battery to the surroundings occurs at a constant rate of 1.8 kW . Determine, for 8 h of operation (a) the total amount of energy stored in the battery, in kJ . (b) the value of the stored energy, in if electricity is valued at 0.08 per kW ·h. | Numerade

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