I can create movement from heat, yet I require fuel to sustain myself. What am I?
Category: Science · Difficulty: hard
Hint: Think about machines that turn heat into power.
Answer
A combustion engine
Explanation
A combustion engine converts fuel into mechanical energy, while the others use different energy sources.
This is a hard science riddle — a tricky one that takes a little thought. The answer is A combustion engine.
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