Sunday, 2024-05-19
The daily puzzle:
What does '*****' mean in the following text?
"An ***** or motor is a machine designed to convert energy into useful mechanical motion. Heat *****s, including internal combustion *****s and external combustion *****s (such as steam *****s) burn a fuel to create heat, which then creates motion. Electric motors convert electrical energy into mechanical motion, pneumatic motors use compressed air and others such as clockwork motors in wind-up toys use elastic energy. In biological systems, molecular motors, like myosins in muscles, use chemical energy to create motion."--++--++--
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