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1. ### 「急題」化學題. Beryllium 有咩用????英文plz!.急

... because of their combination of high electrical and thermal conductivity, high strength and hardness, nonmagnetic properties, along with good corrosion ...

分類：科學及數學 > 化學 2007年09月16日

2. ### 我想要木對工程好處 同對建築物 好處 20分

... appearance. - Timber has a low thermal conductivity. - The material is easily worked... timber sections have bad fire resistance. - Untreated timber ...

分類：科學及數學 > 工程學 2013年04月21日

3. ### resistivity

1. Resistance of copper wire R = (rho).L/A where (rho) ...calculate R(expansion)/Ro and then find the percentage change in resistance (c) R(change in ...

4. ### 關於物理的簡單問題(2)

1. Let I be the current flowing through the circuit. Energy dissipated on the circuit = I^(R+r) Energy dissipated on load = I^2.R Hence, efficiency = ...

5. ### 急:Heat and sound

B) velocity =frequency X wavelength 320 = 1.6f f = 200Hz

6. ### 動物界世中之最108

...sand The shovel-snouted lizard performs a "thermal dance" when the sand becomes too hot for ... to ease entry into the sand and minimise resi ...

分類：科學及數學 > 生物學 2009年07月31日

7. ### 鈷是什麼?(英文答案)

.... Electroplating because of its appearance, hardness, and resistance to oxidation. Drying agents for paints, varnishes, and...

8. ### 英文高手入來,中7英文

1.a 2.a 3.b 4. sound waves will pass through the cotton rope to the other side of the mouthpiece for release 5.As the drinks come into contact ...

分類：社會及文化 > 語言 2010年08月29日