Petrol cars transform chemical energy into useful kinetic energy. A typical energy efficiency of this transformation is 15%.Compare the efficiency of the petrol car to the electric car described above.Hint: Use your answer from the previous question to answer this.

A particular electric car is supplied with 300 kJ of chemical energy by the battery. Of this, a total of 70.5 kJ of energy is wasted as heat.Calculate the overall efficiency of the electric car.

A car is driven along a level road. The total energy is put from the petrol is 60 KJ and the car wastes 45KJ of energy. What is the efficiency of the car?

Directions: Select the choice that best fits each statement. The following question(s) refer to the following energy efficiencies, expressed percentages.(A) 100%(B) 95%(C) 30%(D) 15%(E) 1%QuestionThe maximum efficiency possible in an energy-conversion process that is not limited by the second law of thermodynamics

17 The total energy supplied to an electric motor is E. Energy Q is wasted and the remaining energydoes useful work.What is the efficiency of the motor?A QE B QE    – 1 C 1 – QE    D (1 )QE

A car burns gasoline as it moves down the road. Which energy transformation is the car performing? A. Chemical energy to kinetic energy and thermal energy B. Potential energy to sound energy and nuclear energy C. Kinetic energy to chemical energy and light energy D. Thermal energy to kinetic energy and nuclear energy