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  2. Collision - Wikipedia

    en.wikipedia.org/wiki/Collision

    Elastic collision If all of the total kinetic energy is conserved (i.e. no energy is released as sound, heat, etc.), the collision is said to be perfectly elastic. Such a system is an idealization and cannot occur in reality, due to the second law of thermodynamics .

  3. Collision (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Collision_(disambiguation)

    Satellite collision, a collision between two objects in orbit around another body; Ship collision, a collision between two ships or a ship and another object; Traffic collision, a vehicle collision with another object Head-on collision, a type of traffic collision; Train wreck, a type of disaster involving one or more trains

  4. Collision theory - Wikipedia

    en.wikipedia.org/wiki/Collision_theory

    Collision theory is a principle of chemistry used to predict the rates of chemical reactions. It states that when suitable particles of the reactant hit each other with the correct orientation, only a certain amount of collisions result in a perceptible or notable change; these successful changes are called successful collisions.

  5. Contact sport - Wikipedia

    en.wikipedia.org/wiki/Contact_sport

    In collision sports (e.g. boxing, ice hockey, American football, lacrosse, and rodeo), athletes purposely hit or collide with each other or with inanimate objects (including the ground) with great force. In contact sports (e.g. basketball), athletes routinely make contact with each other or with inanimate objects but usually with less force ...

  6. Traffic collision - Wikipedia

    en.wikipedia.org/wiki/Traffic_collision

    A traffic collision in Japan, 2007 The aftermath of an accident involving a jackknifing truck, Mozambique, Africa. A traffic collision, also known as a motor vehicle collision, or car crash, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other moving or stationary obstruction, such as a tree, pole or building.

  7. Collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Collision_avoidance_system

    A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver- ...

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  9. Cross section (physics) - Wikipedia

    en.wikipedia.org/wiki/Cross_section_(physics)

    In physics, the cross section is a measure of the probability that a specific process will take place in a collision of two particles. For example, the Rutherford cross-section is a measure of probability that an alpha particle will be deflected by a given angle during an interaction with an atomic nucleus.