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標題:
physics electricity
發問:
janet has bought a refrigerator and a washing machine affixed with grade 1 grade 1 level appliances are most energy efficientgrading level ------ 3.......................5 washing machine 20%.................40%the above information shows the approximate percentage of electricity saved as... 顯示更多 janet has bought a refrigerator and a washing machine affixed with grade 1 grade 1 level appliances are most energy efficient grading level ------ 3.......................5 washing machine 20%.................40% the above information shows the approximate percentage of electricity saved as compared to those with different grading levels the electric energy required per load of janet's washing machine is 0.6kwh. janet waches her clothes 3 times a week , compared to a grade 5 level washing machine with the same functions and electric power, what is her annual electricity saving? suppose there are 52 weeks in a year
Electricity consumption in a year by using Janet's washing machine = 0.6 x 3 x 52 kWh = 93.6 kWh Hence, electricity consumed by a grade 5 level washing machine in a year = 93.6/(1-0.4) kWh = 93.6/0.6 kWh = 156 kWh Therefore, annual electricity saving by using a grad 1 level machine = (156 - 93.6) kWh = 62.4 kWh
其他解答:
physics electricity
發問:
janet has bought a refrigerator and a washing machine affixed with grade 1 grade 1 level appliances are most energy efficientgrading level ------ 3.......................5 washing machine 20%.................40%the above information shows the approximate percentage of electricity saved as... 顯示更多 janet has bought a refrigerator and a washing machine affixed with grade 1 grade 1 level appliances are most energy efficient grading level ------ 3.......................5 washing machine 20%.................40% the above information shows the approximate percentage of electricity saved as compared to those with different grading levels the electric energy required per load of janet's washing machine is 0.6kwh. janet waches her clothes 3 times a week , compared to a grade 5 level washing machine with the same functions and electric power, what is her annual electricity saving? suppose there are 52 weeks in a year
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最佳解答:Electricity consumption in a year by using Janet's washing machine = 0.6 x 3 x 52 kWh = 93.6 kWh Hence, electricity consumed by a grade 5 level washing machine in a year = 93.6/(1-0.4) kWh = 93.6/0.6 kWh = 156 kWh Therefore, annual electricity saving by using a grad 1 level machine = (156 - 93.6) kWh = 62.4 kWh
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