key equations to remember

Question 1

% Uncertainty for repeated measurements=

Answer 1

% Uncertainty = uncertainty/mean value *100

Question 2

% uncertainty =

Answer 2

uncertainty/ value * 100

Question 3

If measurements are repeated many times ( for instance repeated results for accurate answers) the uncertainty can be found by finding…

Answer 3

half the range of the measured values 1.32-1.22 = 0.10 uncertainty = +/_ 0.05

Question 4

how do you find the total measurement and uncertainty of 2 or more measurements

Answer 4

1. Find the uncertainties of all measurements( by halfing the lowest resolution of each measurements measuring tool)
2. Add the measured readings/ measurements (volumes)
3. Add together the uncertainties to get the combined uncertainty
4. Combine step 2and 3 to give your answer
   added reading±added uncertanties

Question 5

percentage change

Answer 5

percentage change = (original val- new val/ original val) x100

Question 6

(for a reading)percentage error=

Answer 6

(uncertainty/reading) x100

Question 7

magnification=

Answer 7

image / actualsize

Question 8

cardiac output=

Answer 8

stroke vol/heart rate

Question 9

Calculation for how many chromosome combinations are possible during meiosis

Answer 9

(2^n)

Question 10

Pulmonary ventilation rate =

Answer 10

Breathing rate x Tidal volume

Question 11

Calculation for how many gamete combinations are possible during random fertilisation

Answer 11

(2^n x 2^n)