Collision
* All collisions have the same momentum before and after a collision.
* Many collisions cause the electrons to wander and eventually to stop
  - occur when cars are overtaking and passing one another
* Most collisions create electric charge
  - encountered in everyday life are inelastic
* Most collisions generate energy
  - heat
  - involve forces
* Most collisions occur because of human error rather than mechanical failure of the car
  - in the fall when breeding season causes deer to be more active
  - when people see the problem too late and have little time to react
  - probably involve members of bound galaxy groups
  - produce dust
* Most collisions result in nuclear reaction
* Some collisions alter atomic structures
  - cause mortality
  - have energy
* Some collisions produce black holes
  - dust clouds
* Some collisions produce massive clouds
  - result in energy.
  * A 'collision' occurs when two objects come in contact with each other. All collisions have the same momentum before and after a collision. Examples of collisions include car crashes, bouncing a ball, and playing pool. Collisions are made from two smaller sections called elastic and inelastic collisions
* are a very common process in our solar system
  - accidents
  - disputes
  - elastic, there is no overall net gain or loss of energy
  - responsible for attenuation in the ionosphere
* are the most common type of personal watercraft accident
  - number one direct cause of death for right whales
* can also give rise to spiral structure
  - strip the gas out of galaxies
* can change individual molecular speeds bu the distribution of speeds remains the same
  - but the distribution of speeds remains the same
  - occur when machinery starting a left turn is hit by a car passing from behind
* cause damage
  - disorder
  - fragments of both bodies to depart from near the point of impact
  - property damage
  - separation
* cause significant damage
* change individual molecular speeds but the distribution of speeds remains the same.
* common cause of injury.
* could have devastate results
* create a burst of energy in which a particle takes form
* eject great burst of stars and gas.
* involving drunken drivers are the nation's single greatest killer of young people.
* is an occurrence
  - evident when they change color
* is the dominant form of ion-neutral interaction
  - most expensive part of auto insurance
  - what happens when two keys hash to the same memory slot
* occur on city streets
  - two objects, or people, bump into each other
* play an important role in cue sports
  - influencing the evolution of asteroids
* result in a compression force, pushing two plates together
* stimulate a burst of star formation.
* transfer energy
  - kinetic energy

### collision:

Elastic collision
* Most elastic collisions involve forces.
* are collisions in which both momentum and kinetic energy are conserved
  - there is no loss of kinetic energy
* conserve both linear momentum and mechanical energy

Galactic collision
* can spur rapid star birth as gas clouds are heated and compressed.
* continue today.

Inelastic collision
* are common whenever sticky things or pointy things collide
  - what cars and occupants do
* conserve both total momentum and energy just as elastic collisions do.
* occur when two objects collide and share momentum as a single body.

Collocation
* are characteristic, co-occurence patterns of words
  - compositional with hierarchical relations among the lexical units
* describe words that tend to be used together in a language.
* is used as an organizing principle.
* refers to arranging materials on a similar topic together.
* remains an important part of the Web hosting market.

### colonial corals:

Tabulate coral
* are colonial corals.
* lack septae.

Colonial organism
* Most colonial organisms have bilateral symmetry
* are the result of many identical individuals joining together to form a colony.