Pressure
* Is the thrust or force per unit area.
* Most pressure affects animals
  - density
  - liquid viscosity
  - weight
* Most pressure causes air movement
  - brain damage
  - energy
  - kinetic energy
  - rapid air movement
  - surface wind
  - changes temperature
  - creates energy
  - depends on temperature
* Most pressure drives expansion
  - pistons
  - impacts soil strength
* Most pressure increases temperature
* Most pressure is caused by depletion
  - volume depletion
* Most pressure is exerted by dense gases
  - hot gases
  - generated by air
* Most pressure is produced by nuclear reaction
  - sustains blood pressure
* Some pressure acts on body size
  - exhaust gases
* Some pressure affects evaporation
  - primate evolution
  - thermal conductivity
  - causes gases
  - damages blood vessels
  - decreases with height
  - draws body fluid
* Some pressure drives charge
  - electrical charge
  - generates energy
* Some pressure is caused by displacement
  - elevation
  - fusion
  - heat
  - helium fusion
  - intense fusion
  - osmosis
  - sound vibration
  - weather
* Some pressure is created by blood
  - sound waves
* Some pressure is exerted by fluid
  - radiation
* Some pressure is generated by contraction
  - muscle contraction
  - solute
* Some pressure is produced by attraction
  - gravitational attraction
  - hearts
  - shock waves
  - strong shock waves
* Some pressure leads to cardiovascular diseases
  - heart diseases
* Some pressure occurs during dehydration
  - explosions
  - prevents heart diseases
  - pushes atoms
* Some pressure relates to temperature
  - winter temperature
* accompanies events.
* acts at right angles and is proportional to size, density and speed
  - in all directions at a point inside a gas
* affects absorption
  - development
  - golfers in many different ways
  - the boiling point of a liquid
* alone is an important additional factor with gases.
* also changes the state of stress
  - with temperature
  - decreases with altitude
* also has a direct relationship to the heat being generated
  - an impact on the state or phase of matter
* also increases due to blood vessels being occluded by contracting muscles
  - with depth
  - influences how divers use air
* alters lifestyle.
* always decreases with altitude.
* applies forces.
* are immense in the deep-sea environment
  - so high inside a supernova that most atoms in the periodic table are produced
* becomes air pressure
  - outside air
* builds on the heart and great vessels, diminishing venous return and cardiac output
  - up and can press on the optic nerve or other structures
* can affect the drafting of combustion equipment like fireplaces or water heaters
  - also alter the way proteins interact
* can build up and herniate the brain through the foramen magnum
  - behind the narrowed intestine and produce cramps
  - cause anxiety, and anxiety distraction
  - change matter from one state to another
  - create bony projections, skin atrophy, and dead skin tissue
  - effect the optic nerve and cause permanent vision loss
  - even cause the eardrum to rupture
  - irritate the nerve sheaths, sensitive muscles, and facet joints in the neck
  - range from light to deep touch
  - result in focused attention and the use of unconscious reasoning
  - bullae, skin atrophy and necrosis
  - cells in the irritated area to grow at a faster rate, leading to overgrowth
  - friction, and friction causes heat
  - leakage
  - oil leakage
* causes rapid air movement
  - variation
* changes aspects
  - more rapidly with height in air that is more dense
  - the rates at which enzymes operate
* changes with altitude
  - depth in the Earth as a result of the increased weight of the overlying rock
* combines with moisture.
* consequence of the moving gas molecules striking the sides of the container.
* created by the cuff causes the blood flow to stop briefly in the arm
  - propellant being burned is what discharges a bullet
  - intense pain
* declines pretty much linearly with height, because there is less atmospheric mass.
* decreases as the speed or velocity increases
  - exponentially with altitude in the atmosphere
  - height in proportion to the mass of the column
  - the average kinetic energy of the particles
  - two principles-depth and density
  - upon both depth and density
* determines the density of carbon atoms in a given space, thus available source of growth.
* develops under film and causes milk to boil over around sides of film.
* distributed force.
* drains energy.
* encounters resistance.
* exerted by the human population on the marine biosphere are substantial and Increasing
  - tumors is associated with epileptic seizures, schizophrenia, and autism
* exhibits a great role in the distribution of deep sea organisms.
* expresses serosanguineous fluid.
* falls are a result of increased divergence aloft
  - gradually with height until the atmosphere blends into interplanetary space
* fine motivator.
* flaking creates the finely serated edges found on all sorts of stone tools.
* force acting equally from all directions
  - on a certain area
* forces the magma up through the cracks, sometimes as far up as the earth's surface
  - water out of the land at a weak point which creates the spring
* form of physical stimuli that tries to get the body to react a certain way.
* gauges Fluid pressure in the spray system is monitored by a pressure gauge.
* has a very specific meaning in chemistry
  - direct effects
* has little direct effects
  - negative effects
  - nothing to do with the motion of the rocket
  - opposite effects
  - the opposite effect on air
* increases density
  - same temperature
  - solubility
  - suddenly, usually in one eye
  - to support the weight of fluid
* increases with depth due to the weight of the overlying rocks
  - in the Earth caused by the weight of overlying material
  - inside solid earth much like pressure increases with depth in water
  - depth, be it in a water column or in rock
* indicates weather.
* influences physiology.
* is about one-trillionth of Earth's atmospheric pressure.
* is also a critical factor in changing some gases to liquids or solids
  - related to density
  - applied to an airy substance called gas
* is applied to stimulate specific acupoints to reduce the inflammation of the conjunctiva
  - to relax tense muscles
  - the meridians to stimulate the body's energy flow
  - associated with collisions of the particles with the container walls
  - built up due to lack of circulation and can cause fluid to leak into the lung tissue
  - from trapped blood forcing water down into the tissues of the feet and ankles
  - created by the heart pumping blood through the arteries
  - dependent on the weight of fluid on an object
* is determined by the stretch or the amount of tension placed on the heart muscle
  - with the aid of a barometer, measuring of course the atmospheric pressure
  - dissipated down through the various layers of materials within the pavement
  - distress
  - due to the force required to keep the molecule in a fixed volume
* is equal to the force acting on an object divided by the area upon which it is acting
  - divided by the area on which it acts
  - height times the density of the fluid
  - liquids and gases and is equal in all directions
  - in all directions in a system
  - experienced when a force is applied to an area
  - expressed as the amount of force applied per unit of area
  - extremely high in the deep parts of the ocean
  - focused in deep tissue over bony prominences
  - force acting on a unit area
* is force divided by area which is mass x gravity over pai x radius squared
  - the area over which that force is applied
  - in outward direction, gravity is force pulling star in
  - or weight over an area
* is force per area
  - unit area, and area is related to the diameter of the tube
* is generated by air
  - incidents
  - projectile incidents
  - greatest in the dependent regions of the lung
  - high in large arteries, but decreases as they approach the capillaries
* is highest as the heart contracts and circulates blood throughout the body
  - in the fall and spring when carbon dioxide is released into the atmosphere
  - how thick or dense the air is
  - increased by pumping water into the vessel
  - inversely propotional to volume
  - lowest between heartbeats, when the heart is at rest
  - measure in Pascals
* is measured as force per area
  - the force felt by a certain amount of surface area
  - at different places on the Earth using a barometer
* is measured by a device called a barometer
  - the standard ruby fluorescence technique
* is measured in force per unit area
  - inches of mercury
  - many different units
  - weight per unit of surface area
  - on a barometer
  - monitored by pressure sensors in the large arteries that carry blood to the brain
  - often a positive force in the modern workplace
  - one of the things that is necessary to pack sedimentary rock together
  - only a state of mind
  - parents figuring out how to pay the doctor bill for a sick child or children
* is proportional to density times temperature
  - punishment to a horse relieving pressure is reward
* is related to force, but it describes the distribution of force over surface area
  - volume by the pressure volume curve of the lungs
  - reported in millibars, which more precise scale than inches of mercury
  - sensation
* is sensed as a desire to defecate
  - by very fine deflections of a sensing diaphragm
  - simply the ratio of force to the area on which the force acts
  - something that is present in high performance tennis
* is the amount of force acting on an amount of area
  - awareness of something demanding extending into the future
  - driving force that causes the water to move through the pipes
  - effort variable like the force in mechanical systems
  - force exerted by the gases in the atmosphere against the Earth
* is the force exerted per unit area of surface
  - of water within the system
* is the force per unit area applied to the surface of an object
  - exerted on an object or exerted by an object
  - that pushes water through pipes
  - greatest environmental factor acting on deep-sea organisms
  - intensity of force
  - measure of how much pushing force something is putting on another object
  - perpendicular force per unit area, or the stress at a point within a confined fluid
  - primary external cause of ischemic damage and tissue necrosis
  - ratio of the force exerted to the area the force acts on
  - repellent force that pushes away, decomposes and contracts
* is the result of force applied to a given area
  - the molecules all imparting momentum to a wall
  - same as force
  - weight of air pressing down on the earth's surface
  - used because it has a large influence on base temperature to be controlled
* is used to drive out gas bubbles trapped in the resin
  - get a horse to do something, desensitization, or as an excercise
  - vectors
  - very strong at sea level and goes down as the altitude goes up
  - what held the water and mercury up in our experimental tubes
* leads to accumulation variability
  - character displacement
  - differences
* limits the range of extremophiles less than temperature does.
* major role in the way bass act and bite.
* makes diamonds and friction makes pearls.
* mays have adverse effects
* measure of force applied per unit of area
  - the weight of the atmosphere above a point
* measurement of the resistance to flow.
* moves from areas of high pressure to areas of low pressure.
* physical phenomenon
* precedes storms.
* produces cloudy weather
  - wet weather
* pushes charge.
* raises water.
* ranks with temperature as a useful thermodynamic parameter.
* reduces capacity.
* reduces the blood supply, causing death in the tissue layers
  - temperature of maximum density
* resists forces.
* results in forces.
* ridges form huge piles of sea ice along the Chukchi Coast
  - in the ice can sometimes reach three times that height
* rises in the eye, causing damage to the optic nerve
  - urinary tract causing a backward pressure on the kidneys
  - when the drainage holes are clogged, causing fluid to back up in the eye
* scalar quantity, acting in all directions.
* stimulates development
  - secretion
* stress where the forces act equally from all directions.
* switches respond to fluid pressure.
* tends to change an item's shape
  - increase the modulus, temperature tends to decrease the modulus
  - push water and solute molecules out of the plasma into the filtrate
* treated lumber is today's industry standard for outdoor use.
* turns coal into diamonds.
* uses high pressure
* varies from place to place and and results in pressure systems
  - smoothly from the Earth's surface to the top of the mesosphere
* word that is misused in our vocabulary.
+ Gas, Physical Characteristics, Pressure: States of matter
  * Pressure is the measure of how much pushing force something is putting on another object. In a gas this is usually the gas pushing on the container of the object or, if the gas is heavy, something inside the gas. Pressure is measure in Pascals. Because of Newton's third law we can change the pressure of a gas by putting force on the object containing it.
+ Le Chatelier's principle, Overview, Pressure: Chemistry
  * Pressure is applied to an airy substance called gas. If there is more pressure, the system will take away the number of molecules, leaving with fewer gas molecules.
+ Mazon Creek, Palaeoecology: Lagerstätten
  * A low-lying tropical swamp or rain forest forms a peat swamp which is short of oxygen. Dead plant material builds up, and does not decompose entirely. The plant material gets buried as a peat bog. From time to time rivers bring down a load of sediment from nearby mountains, covering the swamp. Eventually layers of coal alternate with layers of sandy deposit. Pressure turns it all into hard rock. Later on, the rocks are uncovered by erosion, and fossils can be found by humans.
  * Pressure is also related to density. By the ideal gas law, for example, doubling the pressure can put twice as much gas in a bottle.