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Neutral solution is one which has pH value

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The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is The law of the machine is (where P = Effort applied to lift the load, m = A constant which is equal to the slope of the line, W = Load lifted and C = Another constant which represents the machine friction.) Pressure of water vapour is given by The vapour pressure over the concave surface is In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.