19 OAB is a triangle. OA = a
ch OB = b
The point C lies on OA such that OC : CA = 1:2
The point D lies on OB such that OD: DB = 1:2
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Using a vector method, prove that ABDC is a trapezium,​

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

since electrons are negative the answer is neagtaive