A motor of a corn mill machine operates on electrical energy of 1.44×105J. If one-quarter of the energy is wasted on sound and heat, determine the efficiency of the machine. by Sunday | Jan 24 | Physics WAEC | 0 comments A. 25% B. 36% C. 64% D. 75% Correct Answer: Option D D. 75% Users Also Read These:A machine of efficiency 80% is used to lift a box.…Calculate the heat energy required to vaporize 50g…A block and tackle system has 6 pulleys. If the…A lamp marked 100W, 250V is lit for 10 hours. If it…Ice of mass 50g at 0°C was completely melted by 70%…