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