In an experiment to determine the size of an oil molecule ,clean water was placed in a large basin and then left over several minutes without any disturbance.lycopodium powder was carefully spread on the water surface .a drop of oil was then taken from a container using a fine wire.its diameter was measured using a millimeter scale with aid of handlens and was found to be 0.35mm. the oil drop was carefully transferred onto the water surface where it spread to form circular patch of diameter 14cm.(a)explain briefly why water was held in a large basin. (b)the water was left undisturb Ed for several minutes.