gc textbook chater 14 heat (id: 99d84b497)

本题目来源于试卷: gc textbook chater 14 heat，类别为 IB物理学

[填空题]
How long does it take t nk1) bzoq0tu).hnde6he Sun to rctl/yig2l;m h+yg*/ melt a block of ice at 0$^{\circ} C$ with a flat horizontal area $1.0\,m^2$ and thickness 1.0 cm? Assume that the Sun’s rays make an angle of 30$^{\circ} $ with the vertical and that the emissivity of ice is 0.050.    h

参考答案: 20±2%


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