A centrifugal pump is operating at a flow rate of 1 m3/s and a head of 20 m. If the specific weight of water is 9800 N/m3 and the pump efficiency is 85%, the power required by the pump is most nearly:

Once a sound recording is made, how is the sound reproduced? by converting passive sound waves into active sound waves by converting sound waves into electronic signals by converting the electronic signals back into sound waves by speeding up the stored sound waves