24. The rate expression for a particular reaction is Rate = k[A][B]3. If the initial concentration of B is increased from 0.2 M to 0.6 M, the initial rate will increase by which of the following factors?(A) 6 (B) 3 (C) 27 (D) 4 (E) 12

5. 一個質量 m 的物體在一直立彈簧正上方高 h 的地方，從靜止開始落下，彈簧的彈力係數是 k。問：彈簧最大的被壓縮量？ (A) \[ \frac{mg \sqrt{m^2 g^2 + k m g h}}{k} \] (B) \[ \frac{mg\sqrt{m^2g^2+2mgh}}{k} \] (C) \[ \frac{m g \sqrt{m^{2} g^{2}+4 k m g h}}{2 k} \](D) \[ \frac{2m g + \sqrt{4m^2 g^2 + 2km g h}}{k} \]