千瓦时和焦耳的关系试
清晰的答
人气:265 ℃ 时间:2019-09-22 06:46:57
解答
1度电=1千瓦时=1000瓦×3600秒=3.6×106焦耳
例:1度电可使二只“220V、40W”电灯工作几小时?
解 t=W/P=1千瓦时/(2×40瓦)=1000瓦时/80瓦=12.5小时
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