UI Vibration, t of a liquid drop is given by t = kayp. Where k a is the radius of the drop, p is the density of the liquid and y is the is its su of dimensions MT2. Show by dimensional analysis that t == (pa² k r 1. Describe briefly an experiment to determine the relative density of a liquid using Archimedes' principle. Give the theory of the method of the method.​

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?