Maths skills workbook stuff Flashcards
Circumference of a circle
Pi x Diameter
Surface area of a cube or cuboid
2 (AB) + 2(AC) + 2 (BC)
A,B,C are side lengths
Surface area of a sphere
4 x Pi x Radius squared
surface area of a cylinder
2 x Pi x r^2 +( pi x diameter x height)
Volume of a cube or cubeoid
A x B x C
Volume of sphere
4/3 x Pi x r^3
volume of a cylinder
Pi x r^2 x h
equation for magnification
Image size= real size x magnification
equation for pH
pH=-log^10[H*]
H= the conc of the hydrogen ion in moles per litre
Equation for Pulmonary ventilation rate
PVR= TIdal volume x breathing rate
Equation for cardiac output
Stroke volume x Heart rate
Species diversity index
D=N(N-1)/sum of n(n-1)
N=the grandtotal of all species sampled
n=the number of each individual species sampled
Lincoln index
N=s^1 x s^2/R
S1=total captured and marked
s2=total number recaptured
R=number of marked animals captured
Equation for efficiency of energy transfer
Energy transferred/Energy intake x 100
Equation for Net Primary Production
NPP = GPP - R
GPP= gross primary production
R= energy loss in respiration
