Physics
When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are

Waves are not produced
Longitudinal
Transverse
Both longitudinal and transverse

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Physics
Should cars have bumpers that collapse under impact?

No, since the colliding car would then ram into the occupants and kill them
No, since it would be very expensive to get the car repaired
Yes, since the offending car should get damaged and pay for the mistake
Yes, since they help to absorb the impact of a collision and keep the occupants safe

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