Chemical energy can be converted into mechanical energy through which of the following systems?

• A. A wind turbine
• B. A combustion engine
• C. A solar panel
• D. A battery-powered electric motor

Answer: (B)

Verified step by step guidance

1. Understand the types of energy involved: Chemical energy is stored in chemical bonds and can be released during chemical reactions, often producing heat or work.
2. Identify which systems convert chemical energy into mechanical energy: A combustion engine burns fuel (chemical energy) to produce mechanical motion.
3. Analyze the other options: A wind turbine converts kinetic energy of wind into mechanical energy, a solar panel converts light energy into electrical energy, and a battery-powered electric motor converts electrical energy into mechanical energy.
4. Conclude that the system which directly converts chemical energy into mechanical energy is the combustion engine, as it uses chemical reactions (combustion) to generate mechanical work.
5. Summarize that the key concept is recognizing the source and form of energy conversion in each system to determine which one involves chemical to mechanical energy transformation.