[解題] 高二物理 很簡單的定壓查給
1.年級:高二
2.科目:物理
3.章節:南一Ch13氣體動力論
4.題目:某君找到一根玻璃毛細管,其中空部分截面積0.1cm^2,長120cm.
若要做成可測量0至100度C間溫度之氣體溫度計,要選擇下面哪一種容器最適當?
A.250cc平底燒瓶 B.200cc味全奶瓶 C.100cc養樂多膠瓶 D.500cc藥水瓶 E.25cc試管
5.想法:假設容器體積V,體積從0到100增加10cc
373 V+10
____=_____=>V=27.3cc
273 V
如果用25cc試管的話,假設毛細管剛剛好在試管口,充好體積封住,毛細管滴一滴墨水..
0度C時,墨水會在毛細管上面,23公分的地方@@(體積多2.3cc)
100度C的話,會增加10CC,因此墨水的位置會在123cm(超過管口,會被噴出來= =)
所以改成假設0~100度C會增加8cc
373 V+8
____=_____=>V=21.84cc
273 V
這樣就可以用25cc試管了,不是嗎?
其實這提是新超群的題目,但是解答我想不通@@
所以自己想這一套解法,不知道觀念上有沒有錯..
請高手們幫我看看..
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220 除了本身以外的因數有:1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110
284 除了本身以外的因數有:1, 2, 4,71,142
而 220=1+2+4+71+142
284=1+2+4+5+10+11+20+22+44+55+110
它們彼此付出了自己的全部而化成了對方....
adapted from MagicFox....
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※ 發信站: 批踢踢實業坊(ptt.cc)
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