同一电源,用R1烧开一壶水为t1.用电阻丝R2烧同一壶水用时t2,R1.R2并联在原电路中烧同一壶水用时t,证明t=t1t2/(t1+t2).
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![同一电源,用R1烧开一壶水为t1.用电阻丝R2烧同一壶水用时t2,R1.R2并联在原电路中烧同一壶水用时t,证明t=t1t2/(t1+t2).](/uploads/image/z/5584523-59-3.jpg?t=%E5%90%8C%E4%B8%80%E7%94%B5%E6%BA%90%2C%E7%94%A8R1%E7%83%A7%E5%BC%80%E4%B8%80%E5%A3%B6%E6%B0%B4%E4%B8%BAt1.%E7%94%A8%E7%94%B5%E9%98%BB%E4%B8%9DR2%E7%83%A7%E5%90%8C%E4%B8%80%E5%A3%B6%E6%B0%B4%E7%94%A8%E6%97%B6t2%2CR1.R2%E5%B9%B6%E8%81%94%E5%9C%A8%E5%8E%9F%E7%94%B5%E8%B7%AF%E4%B8%AD%E7%83%A7%E5%90%8C%E4%B8%80%E5%A3%B6%E6%B0%B4%E7%94%A8%E6%97%B6t%2C%E8%AF%81%E6%98%8Et%EF%BC%9Dt1t2%2F%EF%BC%88t1%2Bt2%EF%BC%89.)
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