formula

Question 1

circumference of circle

Answer 1

2πr

Question 2

area of circle

Answer 2

πr2

Question 3

surface area of cuboid

Answer 3

2(bh + bl + hl)

Question 4

volume of cuboid

Answer 4

hbl

Question 5

mean

Answer 5

total of x divided by n

Question 6

percentage change

Answer 6

(new - original) ÷ original THEN x100

Question 7

percentage yield

Answer 7

actual ÷ theoretical THEN x100

Question 8

% error (uncertainty)

Answer 8

(2 x absolute uncertainity) ÷ quantity measured THEN x100%

Question 9

magnification

Answer 9

image ÷ actual

Question 10

Rf

Answer 10

distance moved by solute ÷ distance moved by solvent

Question 11

rate

Answer 11

change in quantity ÷ time taken

Question 12

SA:V ratio

Answer 12

SA ÷ V

Question 13

proportion of polymorphic gene loci

Answer 13

number of polymorphic gene loci ÷ total number of loci

Question 14

cardiac output

Answer 14

heart rate x stroke volume

Question 15

respiratory quotient

Answer 15

CO2 produced ÷ O2 consumed

Question 16

microorganism population growth

Answer 16

N = N0 x 2n

Question 17

efficiency of biomass transfers

Answer 17

biomass transferred ÷ biomass intake THEN x100

Question 18

temperature coefficient

Answer 18

Q10 = R2 ÷ R1