Question

which best describes how energy changes form in a cars engine? a single transformation occurs because the chemical energy of the fuel is changed to the mechanical energy of the car. a single transformation occurs because the mechanical energy of the car originates from one spark. multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy multiple transformations occur because the chemical energy of the fuel must be replenished to keep the car running

Explanation:

Step1: Analyze energy - change in car engine

In a car's engine, the chemical energy stored in the fuel is not just converted into mechanical energy. There are other forms of energy involved such as heat energy (due to in - efficiency and combustion processes) and sound energy. So, multiple energy transformations occur.

Step2: Evaluate each option

Option A is incorrect as it is not a single transformation. Option B is wrong because the mechanical energy does not originate from one spark only; the spark just initiates the combustion of fuel. Option D is incorrect as the need to replenish fuel is not related to the number of energy - transformation types. Option C correctly states that multiple transformations occur as the chemical energy of the fuel is changed to several forms of energy like mechanical, heat, and sound.

Answer:

C. Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy