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Physics Paper 2, May/June. 2010  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Main
General Comments
Weakness/Remedies
Strength

Question 6

(a) List two examples each of substances with:
(i)        low viscosity;
(ii)       high viscosity.
(b) When is a liquid said to be viscostatic?

Observation
Part (a) was well handled by majority of the candidates. For part (b) very few of the responding candidates succeeded in giving the correct meaning of a visco static liquid.
The expected answers are
(a) (i) Any two correct examples
e.g.
water
kerosene
ethanol
methylated spirits.
(ii) Any correct two examples
e.g.
palm oil
engine oil
glycerine
(b) A liquid is visco static if of its viscosity does not change (appreciably) with change in temperature.
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