maths skills Flashcards

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1
Q

metres-millimetres-micrometres-nanometres

A

x1000

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2
Q

percentage change

A

percentage change= (new quanity-original quantity)/original quantity x100

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3
Q

percentage yield

A

actual amount/theoretical amount x100

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4
Q

percentage uncertainty

A

maximum error/quantity measured x100

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5
Q

student’s t-test

A

compare the difference between two means and see if it significant

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6
Q

chi-squared

A

comparing the observed results to expected results, usually categorcial data

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7
Q

correlation co-efficient

A

used to find the strength of a correlation between two sets of continuous data

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8
Q

magnification

A

image size/actual size

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9
Q

pulmonary ventilation rate

A

tidal volume x breathing rate

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10
Q

cardiac output

A

stroke volume x heart rate

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11
Q

NPP

A

NPP = GPP - R

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12
Q

net production of consumers

A

N = I - (F+R)

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13
Q

hardy-weinberg

A

p+q=1
p2+2pq+q2=1

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14
Q

biodiversity

A

d= N(N-1)/Σn(n-1)

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15
Q

surface area of a cube

A

(lxl) x 6 sides

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16
Q

volume of a cube

A

l3

17
Q

surface area of a cuboid

A

2(lh + lw + hw)

18
Q

volume of a cuboid

A

l x w x h

19
Q

surface area of cylinder

A

2πr2 + 2πrh

20
Q

volume of a cylinder

A

πr2h

21
Q

y axis

A

dependent variable

22
Q

x axis

A

independent variable

23
Q

volume of a sphere

A

4/3πr3

24
Q

straight line

A

y = mx + c

25
Q

gradient

A

change in y/change in x

26
Q

pH

A

pH= -log10[H+]

26
Q

logarithms

A

logarithms are powers to which a base is raised so log100=2 and log1000=3

27
Q

benefits of using ratio

A

allows comparison and starting amounts are different

28
Q

dilution series

A

C1 x V1 = C2 x V2
V2 + V1 + volume of distilled water
- C1 = conc. of stock solution
- V1 = vol. of stock solution
- C2 = conc. of solution being made
- V2 = vol. of solution being made