An 1100 kg car is driving at a constant velocity. The force of the car’s engine is 2000 N and friction is present between the car’s tires and the road. What is the coefficient of friction between car's tires and the road? g=9.8 m/s/s

An electrical heater in the form of a horizontal disk of 0.5 m diameter is used to heatthe bottom of a tank filled with water at a temperature of 5°c. calculate the powerrequired to maintain the heater surface temperature at 80°c. (25pts)