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 ] |