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Origin: sally.csie.ntu.edu.tw

※ 引述《wangkevin (~Kevin~)》之銘言：
: 雖然同學們都說很簡單`但因為自己物理底子真的很不好`連題目都看不太董`
: 拜託各位告訴我`我明天就要交作業了..現在一題都不會...><||

明天就要交...

: 一共有4題作業~~~
: 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?
平均每平方公尺的地面可以接收到200瓦的太陽能
太陽能電池只能將其中10%轉成電能
如果你家需要3千瓦的電能
你須要裝多大的太楊能板?


: 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?
每克酒精揮發要吸200卡的熱
2kg的酒精揮發所吸的熱可以使多少0度C的水結成冰？

: 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?

在2700K和270K之間工作的熱機效率的理論上限為何？

: 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.
丟兩顆骰子出現的點數情型總共有6*6=36種
把每一種都列出來

解釋為什麼丟兩顆骰子
總合是七點的機率最大?

解釋為什麼熱力學中
(好像應該要加上熱平衡時)
系統最可能處在具有最多microstate的狀態

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◆ From: 140.112.213.158
※ 編輯: mantour         來自: 140.112.213.158      (11/29 20:45)