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题目.为了测量太阳的辐射功率,某人采用如下简单实验.取一个横截面积是3×10-2m2的不高的圆筒,筒内装水0.6kg,用来测量辐射到地面的太阳能.某一天中午在太阳光直射2min后,水的温度升高了1℃.求:(1)在阳光直射下,地球表面每平方厘米每秒钟获得的能量.(2)已知辐射到大气顶层的太阳能只有η=50%到达地面,另外50%被大气吸收和反射,而未到达地面.请你由
In order to measure the radiant power of the sun, someone uses the following simple experiment: Take a low cylinder with a cross-sectional area of 3 × 10-2m2, and weigh 0.6kg in the cylinder to measure the solar energy radiated to the ground. One day at noon in the direct sunlight 2min, the water temperature increased by 1 ℃. Seeking: (1) in direct sunlight, the Earth’s surface energy per square centimeter per second (2) known to the top of the atmosphere Only η = 50% of the solar energy reaches the ground, while the other 50% is absorbed and reflected by the atmosphere without reaching the ground.