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  1. The given image " http://imm.io/Ys2n " cannot be seen. 2013-03-11 16:22:48 補充: 1.1 Statement 2 is wrong. Midnight sun can only be seen in ...

  2. 1.(a) Magnetic force on a single wire = B.l.J Hence, magentic force on N wires = NBlJ (b) Torque = (NBlJ).l = NBl^2J (c) Torque produced by the object at ...

  3. 14) (-k)³ + k(-k)² + 2k(-k) + 3 = k 2k(-k) + 3 = k 2k² + k - 3 = 0 (2k + 3)(k - 1) = 0 k = - 3/2 or k = 1 (C) 28) If f(x) and g(x) intersect at more ...

    分類:科學及數學 > 數學 2013年03月03日

  4. 1. Cold air has a high density and hence sinks to the floor. Hot air rises and is cooled down by the air-conditioner. Thus a convection current is set up. ...

  5. 圖片參考:http://imgcld.yimg.com/8/n/HA00273367/o/20130220211531.jpg (a) OP^2 = a^2 + (2a^2 - 2)^2 = 4a^4 - 7a^2 + 4 dOP/da = 16a^3 - 14a = 0 => ...

    分類:科學及數學 > 數學 2013年02月21日

  6. b)(i) Hint: Volume of tetrahedron = (1/3)(base area)(height) since the base area (area of ΔBCD) is fixed, the height has to be maximum in order to achieve ...

    分類:科學及數學 > 數學 2013年02月18日

  7. Don't ignore your unhappiness Depression is becoming a common issue among teenagers,as they need to face lots of homework,exams and assignments at ...

    分類:社會及文化 > 語言 2013年02月14日

  8. 11(a)(i) AB = 2√α, AC = 9 - αArea of ABC = AB * AC/2 = 2√α(9 - α)/2 = √α(9 - α)(ii) Let f(α) = √α(9 - α)f'(α) = (9/2)α^(-1/2) - (3/2)α^(1/2)Set ...

    分類:科學及數學 > 數學 2013年02月10日

  9. 1)For the profit $y = - 16(t - 25)² + 10000 > 0 , (t - 25)² < 625 - 25 < t - 25 < 25 0 < t < 50The max total profit can be made by ...

    分類:科學及數學 > 數學 2013年02月07日

  10. 中文: 史蒂夫·喬布斯通過昨天是那些極少數情況下,當它似乎對某些人,如果世界站定。它已經知道了一段時間,蘋果公司聯合創始人健康狀況不佳,他甚至提到他正 ...