General Knowledge Multiple Choice Questions
General Science - Test - 06
When two bodies are rubbed against each other beat is produced. Where from the heat energy comes ?
The mechanical work done in rubbing the bodies is transformed into the heat energy,
When two bodies are rubbed, their molecules are set in violent motion. Due to this motion, some of the heat energy of the bodies comes to their surface.
When the two bodies are rubbed, some of the adhesive force between the two bodies is transformed into kinetic energy.
None of these.
Whales die if their echo system fails.
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