Physics
Should cars have bumpers that collapse under impact?

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

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Physics
X-rays region lies between

Gamma-rays and ultraviolet region
Short radio waves and long radio waves
Ultraviolet and visible region
Visible and infra-red region

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