虽然同学们都说很简单`但因为自己物理底子真的很不好`连题目都看不太董` 拜托各位告诉我`我明天就要交作业了..现在一题都不会...><|| 1.at a certain location, the solar power per unit area reaching the earth's surface is 200W/m2,average over a 24-hr day. if you live in a house whose average power requirement is 3kW and you can convert solar power to electric power with 10% efficiency, how large a collector area will you need to meet all your household energy requirements form solar energy? Will it fit in your yard? 2.the heat of vaporization of ethyl alcohol is about 200 cal/g. if 2kg of this fluid were allowed to vaporize in a refrigerator, how many grams of ice would be formed from 0'C water? 3.what is the ideal efficiency of an automobile engine in which fuel is heated to 2700 K and the outdoor air is at 270K? 4.construct a table of all the possible combination of nubers that can come up when you throw two dice. your friend says,"Yes,I know that seven is the most likely total number when two dice are thrown. but why seven? "based on your table answer your friend,and explain that,in thermodynamic, the situations that are likely to be observed are those that can be formed in the greatest number of ways. --

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