若某家庭使用功率为2000W、容积为100L的电热水器，加满水后从10℃加热到70℃，这些水需要吸收的热量是_1J。若该电热水器正常工作，电热水器的效率为90%，则需要的加热时间为_2s。[水的比热容_刷题宝

题干

若某家庭使用功率为2000W、容积为100L的电热水器，加满水后从10℃加热到70℃，这些水需要吸收的热量是____ J。若该电热水器正常工作，电热水器的效率为90%，则需要的加热时间为____ s。[水的比热容是4.2×10³J/（kg•℃）]。

上一题下一题 0.0难度选择题更新时间:2017-07-25 01:52:46

答案(点此获取答案解析）

2.52×10⁷，,14000

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