1.

a) Calculate the power of the pump which can lift 100 kg of water to store in a water tank atthe height of 19 m in 25 sec. (take the value of g-10 m/s')b) Describe two methods used to reduce the friction between two surfaces.

Answer» <p>Reducethe forces acting on thesurfaces. </p><p>Reducethe contactbetweenthesurfaces.</p>


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