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How Far Will It Skid?
Most drivers' education classes teach future drivers in which the stopping distance of a skidding car is in a straight line proportional to the square of the speed of the car. Which is a car traveling 10 mi/hr might needed 4 feet to skid to an abrupt halt; other than a car going twice as fast - 20 mi/hr - would need four times the distance - 16 feet to skid to a stop. A doubling of the speed results within a quadrupling of the stopping distance. A tripling of the speed would raise the stopping distance through a factor of nine. And a quadrupling of the speed would raise the stopping distance through a factor of 16. The stop distance is proportional to the square of the speed of the vehicle.
Under particular condition, light can also suffer inelastic scattering from molecules in which it's wavelength changes.
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