估唔到我走左咁耐，呢個post仲度 之前因電腦壞左，所以冇上黎一排 而家上番黎，即刻更新呢個post先 實用方程式： -------- 生物學： 光合作用 ：6H2O（水）+ 6CO2(二氧化碳）= C6H12O6(葡萄糖) + 6O2(氧氣）+ Energy 呼吸作用：C6H12O6(葡萄糖) + 6O2(氧氣）= 6H2O（水）+ 6CO2(二氧化碳） [注:此過程會釋放出名為ATP的能量，即adenosine triphosphate(三磷酸腺)] -------- 物理學： 密度：density(密度) = mass(重量) / volume(容量) 能量 : Energy(能量) = mass(重量) X Celeritas^2(光速^2) [注:Celeritas是拉丁文，在這條方程式上代表真空光速的來源。] 力量：force(力量) = mass(質量) x acceleration(加速度) 加速度 : acceleration(加速度) = mass(重量) / speed^2(速度^2) 速度： speed(速度) = distance(距離) / time(時間) -------- 化學： 化學風化：HCl（含微酸的雨水）+ CaCO3（石）= H2O（水）+ 6CO2(二氧化碳）+ CaCl (鹽） mass = number of moles x molar mass Avogadro's constant = 6.02 x 10^23 Number of particles/atoms = number of moles x Avogradro's constant Molecular formula = number of moles x empirical formula Percentage yield = (actual yield / theoretical yield) x 100% Initial concentration x initial volume = final concentration x final volume Molar concentration (mol/L) = amount of solute (mol) x volume of solution (L) Ideal gas law : PV = nRT P: Pressure, V: volume, n: number of moles, T: temperature (in Kelvin) R: Ideal gas constant -------- 數學： Equation of line : General Form : Ax + By + C = 0 Point slope form : y - y1 = m(x - x1) , m = slope(斜率) Two point form : y - y1/x - x1 = y2 - y1/x2 - x1 Slope intercept point : y = mx + b , m = slope(斜率), b = y-intercpet(截段) Quadratic equation : ax^2 + bx + c Quadratic formula : ± represents "plus or minus" ( ± 代表" 正或負") Intercept form : x/a + y/b = 1 , a = -A/C , b = -B/C (A,B,C in general form) Length of line(線的長度) : Sq root(平方根) of (x1 - x2)^2 + (y1 - y2)^2 Midpoint of line(線的中點) : x = (x1 + x2)/2 , y = (y1 + y2)/2 Slope of line(線的斜率) : slope(斜率) = rise/run -------- Trignomotry(三角學)： SineA = Opposite/Hypotensue CosineA = Adjacent/Hypotensue TangentA = Opposite/Adjacent = sinA/cosA -------- Law of Sine ：(Sin A)/a = (Sin B)/b = (Sin C)/c Law of Cosine ：a^2 = b^2 + c^2 - [2bc(cos A)] b^2 = a^2 + c^2 - [2ac(cos B)] c^2 = a^2 + b^2 - [2ab(cos C)] Law of Tangent : (a + b)/(a - b) = tan[0.5(α - β)] / tan[0.5(α + β)] [ 本帖最後由 johnny19931993 於 2009-8-20 11:10 AM 編輯 ] |
實用??? |
| 推一推先 大家睇下啦，加左好多野呀 |
| 其實係中幾程度... 我小六咋 =.= |
引用： 原帖由 benny 於 2007-12-9 01:07 PM 發表。 其實係中幾程度... 我小六咋 =.= 加拿大既Grade 9，即係香港既中三，但係始終係外國，程度可能會有o的唔同 |
| 才中二－ － 不明白＝口＝ |
| 真深奧.囧 聞所未聞 |
| 推推=]* 唔係呢... 好多中1.2都學左呢.... |
| Thank you very much!!! You help me a lot ~~~ ^ ^ CaCO3（石) 我想問CaCO3是指是石的成分/simpler form? 另外, why 要係d CO2 ar~ O2 ar~ 前面加6?? p.s. 我中2 but interest in MAths and Science (espeically in Physic!!! ^ ^) |
引用： 原帖由 Hail少 於 2008-4-2 10:45 PM 發表。 CaCO3（石) 我想問CaCO3是指是石的成分/simpler form? CaCO3係石灰岩(Limestone) 引用： 原帖由 Hail少 於 2008-4-2 10:45 PM 發表。 另外, why 要係d CO2 ar~ O2 ar~ 前面加6?? 因此化學反應需要6個CO2分子和6個O2分子作reactants |
| 物理有冇萬有引力 F=G(M-m/r^2) |
| Law of Sine ：(Sin A)/a = (Sin B)/b = (Sin C)/c Law of Cosine ：a^2 = b^2 + c^2 - [2bc(cos A)] b^2 = a^2 + c^2 - [2ac(cos B)] c^2 = a^2 + b^2 - [2ab(cos C)] Law of Tangent : (a + b)/(a - b) = tan[0.5(α - β)] / tan[0.5(α + β)] 唔明呢個= = 解釋下原理，ｏｋ？ |
引用： 原帖由 XDD 於 2008-4-30 11:53 PM 發表。 Law of Sine ：(Sin A)/a = (Sin B)/b = (Sin C)/c Law of Cosine ：a^2 = b^2 + c^2 - b^2 = a^2 + c^2 - c^2 = a^2 + b^2 - Law of Tangent : ( ... 有圖，只要把適當的數據填入適當的variable，剩下的variable就能計出 |
| 即係只要有information 跟著sub佢就得??? |
| 唔知你up乜-____- |
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