### entity:

Object
* ALL objects attract each other with a force of gravitational attraction.
* All objects absorb and emit radiation
  - reflect visible light in different ways
  - always emit some radiation
* All objects consist of many, many particles which are in constant motion
  - matter
  - continuously emit light of some wavelength or another
* All objects emit electromagnetic energy in varying wavelengths and directions
  - waves
  - energy at levels determined by their temperature
  - heat in the form of electromagnetic radiation
  - heat, and the hotter an object, the shorter the wavelength of radiation it emits
  - infrared radiation
  - invisible infrared energy
  - light if they are heated to a sufficiently high temperature
  - measurable infrared energy
  - some energy in the form of radiation
  - thermal energy or heat unless they have a temperature of absolute zero
  - various levels of infrared energy
  - exert a gravitational attraction on other objects
  - experience a buoyant force when immersed in a fluid
  - fall due to gravity
  - generate electromagnetic radiation
* All objects give off heat
  - or reflect light
* All objects have a center of buoyancy
  - centre of gravity
  - certain temperature and emit waves of thermal energy called infrared radiation
  - force of attraction to one another
  - gravitational field which attracts other objects
* All objects have a natural frequency or set of frequencies at which they vibrate
  - frequency, or rate of vibration, depending on their size and shape
  - continuum radiation
* All objects have internal energy manifested by the microscopic motions of particles
  - kinetic energy
  - mass, velocity, moments of inertia, and other real-world properties
  - weight
  - naturally emit infra-red radiation in proportion to their surface temperature
  - possess mass
  - radiate in many wavelengths
  - reflect a certain amount of electromagnetic energy
  - resist changes in their state of motion
  - take up mass
  - transfer thermal energy by infrared radiation
* Any object expands when heated and contracts when cooled
  - made of an elastic material has a natural period of vibration
  - moving away from a dog triggers an instinctive urge to bite
* Every object attracts every other object, by virtue of their having mass
  - being with a soul
* Every object emits electromagnetic radiation
  - energy with wavelengths characterisic for the object's temperature
  - some form of electromagnetic radiation
  - exerts a gravitational force on every other object
* Every object has a center of gravity somewhere
  - characteristic spectra in the infrared spectrum
  - mass and a contour
  - set of coordinates that define a position in the two-dimensional space
  - unique natural frequency of vibration
  - an absolute center position where all forces exerted by the body equal zero
  - is made up of matter
  - maintains a constant velocity unless acted upon by an unbalanced force
  - pulls on every other object gravitationally equally and in the opposite direction
* Many objects are about as deep as they are wide
  - too large to leave the stomach
  - reveal different aspects of their behavior at different wavelengths
* Most objects contain the same number of protons and elec-trons and, therefore, carry no charge
  - emit radiation at many wavelengths
  - give off several frequencies of energy simultaneously
* Most objects have a wavelength that is too small to be detected
  - close to zero net electric charge since they are made of neutral atoms
  - tend to absorb infrared rather than reflect it
  - weigh more than the air that they replace and therefore settle to the ground
* Some objects are luminous - they give off their own light
  - more difficult to photograph than others
  - so small they fail to register on the retina and hence are too tiny to be seen
  - sources of light
  - can change shape reversibly
  - carry electrical charges and create electric fields
  - decay much faster than others
* Some objects emit light only in certain wavelengths
  - only radio waves or only X-rays
  - very little or no visible light, but do emit radio signals
  - fade faster simply because their chemical bonds break down faster
* Some objects have mental properties
  - multiple pointings
  - sharp geometric features such as corners and creases
  - occur in nature while others have been designed by people to solve human problems
* Some objects reflect infrared radiation and some absorb it
  - radio wave better than others
  - reflect, as well as emit, infrared energy
  - roam the oceans for decades before finally coming ashore
* Some objects sink in water, some float, and others remain suspended
  - when placed in water and others float on the surface
  - take up more space, and some take up a small amount of space
  - tend to vibrate at a single frequency and they are often said to produce a pure tone
* absorb some colors and reflect others
  - wavelengths of light and reflect others
* acquire a terrible weight when they are no longer attached to people
  - information and behavior from other objects
* appear brighter or darker relative to the amount of light energy they reflect
  - different as the times of day changes
* appear to be a particular color because they reflect some wavelengths more than others
  - different colours because they absorb some wavelengths and reflect others
  - float through the air by themselves
* are a reflection of the real world and represent our perception of that world
  - able to store energy as a result of their position
  - abstract data types that are used to represent operating system resources
  - abstractions of real-world entities that exhibit states and behaviors
  - also collections of behaviours that control and manipulate their associated data
  - always in the light
  - any data that can be used in an application or shared with other applications
  - attracted toward the earth, because of their mass
  - complementary to subjectivity in the constitution of consciousness
  - components of object models
  - computer science
  - constantly rubbing against the Earth and the layer of air it pulls along
  - constituents
  - content
  - dead, lifeless, without any inner vitality or consciousness of their own
  - electronic things
  - encodings of ideas, physical entities, immaterial entities, concepts, or patterns
* are entities or people that change as a result of the action
  - which have parts and behavior
  - idealizations of real world objects
  - in free fall when gravity is the only force affecting their motion
  - instances of interfaces, on which clients can perform operations
  - intances of a class
  - just data structures in memory, and are referenced by their address
  - known to accelerate down inclined planes because of an unbalanced force
  - like cells
* are located in basements
  - drawers
  - trash
  - made up of different materials
  - modules which contain BOTH data and instructions in self contained units
  - moving, they collide and they move apart
  - natural things to model because that's what the world is made of
  - nouns
  - part of sentences
* are pieces of code that can be used to build larger systems more simply
  - data that can be packaged and manipulated by the programmer
  - memory with the same structure that can be used again and again
  - re-usable software components, combining code and attributes
  - representational constructs of entities
  - runtime manifestations of a class that exist in a computer's memory
  - similar to entities, except that they have no graphical or geometric meaning
  - smaller when they are cold, larger when hot
* are software entities that contain their own programming code
  - representations of real-world entities
  - temporary configurations of energy and matter into recognizable forms
* are the currency of object oriented design
  - geometric figures being created and manipulated
  - parts of individuals
  - principal building blocks of object-oriented programs
  - things that have properties
  - visible by their being perceived, but have no shadows
* belong to types that define the names and signatures of their methods.
* can also change in volume, if they experience a force from all sides
  - take on a different appearance because of their particular chemical compositions
* can be highly reflective, often acting much like a mirror
  - opaque in one region of the electromagnetic spectrum and transparent in another
  - stationary or moving with constant linear velocity
  - begin to move gradually, and accelerate, or spin gently to a stop
  - exert forces on each other at a distance
  - have a position, a velocity, and an acceleration
  - only produce radiation that is about as large as the object itself
  - represent a wide variety of entities
  - rotate, revolve around others, or move along curves
  - symbolize one s sexuality and desire
* contain energy in a variety of forms.
* die when they no longer grow, evolve, or change in correlation with our lives.
* differ in that they have identity.
* displace their volume in a fluid.
* do gain speed as they fall.
* emit energy because they absorb energy
  - light in different wavelengths
  - more intense radiation at higher frequencies as they are heated
* emitting as blackbodies give off more energy per surface area as they get hotter
  - heat show up as white images
* exist in cells.
* feel warmer or colder to the touch.
* float better in hot water than in cold water
  - if they're lighter than the amount of liquid that they displace, or push aside
  - or sink as a result of their density
  - when they are less dense than water
* fly through the air, stars wheel through the universe.
* get smaller and smaller as they approach the horizon
  - their color from pigments that act to absorb some colors of light and reflects others
* give off tiny molecules of themselves into the air.
* have a natural surface tension and a higher rigidity, or resistance to applied force
  - hierarchies, types, compositions, polymorphism
  - kinetic energy because they are moving
  - length, width, and height
* have many observable properties, including size, mass, shape, color, and temperature
  - mass, which is how much matter an object contains
* have properties that can be measured using standard metric units
  - observed using the senses
* have properties, including identity, state, behavior, lifetime, and boundary
  - parts and relations to one another
  - size and weight
  - state and behavior
  - surfaces
* have the ability to be represented linguistically
  - do things
  - same color throughout their lifetime
* having higher masses have higher inertia.
* hitting our atmosphere usually burn up because they are hitting it so fast.
* illuminated with monochromatic light can only exhibit that single color.
* immersed in liquids are subject to the phenomenon of buoyancy.
* lose their charge very fast in humid air.
* made by prehistoric people are called artifacts
  - of matter can exert forces on each other, causing changes in their motion
* make arcs through the sky due to the Earth's rotation
  - up the substance of the world
* move in space as they move in time
  - the direction they are pushed or pulled
  - much more slowly through very cold liquids than through warm liquids
* move through absolute space
  - various states as they are influenced by outside stimuli
* moving have kinetic energy that can be transmitted to other objects
  - in circles have a speed which is equal to the distance traveled per time of travel
* occupy regions of spacetime.
* often have parts which are objects.
* only weigh something when there resistance to their falling.
* oriented languages have special language mechanisms to support data abstraction
  - processing is used for storage and transfer of information
* oriented programming allows for extension of an objects function or of class function
  - design philosophy
  - involves the partitioning of a program into classes and methods
  - systems deal with objects which have properties and methods
* physical entity
* play the role of abstract containers of information.
* reach thermal equilibrium by transferring heat back and fourth.
* refers to an application , file, folder and other processes.
* resist changes in their motion
* retain heat, and as duly noted, post ice-out panfish gravitate toward heat
  - the same mass, wherever they are
* rise at low altitude and easterly azimuth and get higher and move westward.
* seem to disappear when they go away because of the laws of perspective.
* simplify programming by promoting abstraction, inheritance, encapsulation, and polymorphism.
* sink or float in water.
* take heat and reradiate it at different wavelengths.
* tend to be smooth, symmetric, and move like rigid bodies
  - lose potential energy whenever possible
* thus acquire a radiance, and begin to glow
  - have color because they absorb some wavelengths and reflect others
* typically emit waves of many kinds at the same time.
+ Fossil, Types of fossils: Paleontology
  * Fossilized excrement, faeces or dung is known as a 'coprolite'. Chemical traces of prehistoric organisms is called a 'chemofossil'. Objects made by prehistoric people are called artifacts.
+ Object (computer science): Computer programming
  * In Object-oriented programming, an 'object' is an instance of a Class. Objects are an abstraction. They hold both data, and ways to manipulate the data. The data is usually not visible outside the object.
+ Programming language, Object-Oriented Programming
  * Objects are pieces of memory with the same structure that can be used again and again. A bank account, bitmap, or hero from a video game could all be objects within a program. A Dog object might have properties like height and hairColor.
  * All objects are created from templates called classes. You can think of a class as a mold from which objects are made. The class defines all the properties and methods that its objects will have. Objects created from a class are called 'instances' of the class. A class can 'extend' another class, which means that it takes all the properties and methods of the class but can add its own.