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What is pressure?

Pressure is determined by what two thi…

What force causes pressure under solids

In what direction does liquid pressure…

The force on a unit area.

The size of the force and the size of the area.

Weight

All directions.

What is pressure?

The force on a unit area.

Pressure is determined by what two thi…

The size of the force and the size of the area.

Pressure

surface area

fluid pressure

air pressure

Force exerted per unit area

The amount of area that pressure may be exerted on for a subs…

a property of all fluids in which pressure is exerted equally…

A force that is the result of the weight of a column of air p…

Pressure

Force exerted per unit area

surface area

The amount of area that pressure may be exerted on for a subs…

Pressure

Two ways of increasing pressure

SI unit of pressure

Pressure gauge

Force per unit area... Force / Area

Increase the force, decrease the area

N/m² or Pa

Measures pressure in a gas

Pressure

Force per unit area... Force / Area

Two ways of increasing pressure

Increase the force, decrease the area

Pressure

Hydrostatics

Communicating vessel

Barometer

Force per unit area.

Branch of Physics which studies pressure and equilibrium of f…

A set of containers which have the same fluid inside

An instrument that measures atmospheric pressure

Pressure

Force per unit area.

Hydrostatics

Branch of Physics which studies pressure and equilibrium of f…

Blaise Pascal

Pascal's Principle

area increases

Daniel Bernoulli

French mathematician and physicist who the measurement of pre…

Pressure increases by the same amount throughout an enclosed…

What happens to the area when the force increases in Pascal's…

Swiss mathematician who was known for work in fluid mechanics

Blaise Pascal

French mathematician and physicist who the measurement of pre…

Pascal's Principle

Pressure increases by the same amount throughout an enclosed…

What is pressure?

Pressure is determined by what two thi…

In what direction does liquid pressure…

What is the unit for pressure?

The force on a unit area.

The size of the force and the size of the area.

All directions.

pascal

What is pressure?

The force on a unit area.

Pressure is determined by what two thi…

The size of the force and the size of the area.

Feeling the pressure?

How do we calculate pressure?

Sensible shoes?

More sensible shoes

Gases and liquids exert pressure in all directions... Pressure i…

Pressure can be calculated by dividing the force by the area…

The force of our body pushing down will exert a pressure... The…

These boots have a large surface area ... The weight of a person…

Feeling the pressure?

Gases and liquids exert pressure in all directions... Pressure i…

How do we calculate pressure?

Pressure can be calculated by dividing the force by the area…

What is pressure?

Pressure is affected by what two things?

What direction do solids press in?

What direction do liquids press in?

A force on a definite area.

The size of the force and the size of the area.

Only down.

All directions.

What is pressure?

A force on a definite area.

Pressure is affected by what two things?

The size of the force and the size of the area.

Pressure

Force

Atmospheric pressure

Barometer

measures the force acting on one unit of area.

is measured in Newtons (N)

The weight of these gases on a square metre of the earth

One simple way of measuring the pressure due to our atmospher…

Pressure

measures the force acting on one unit of area.

Force

is measured in Newtons (N)

Dalton's law of partial pressure

Effect of low atmospheric pressure and…

High altitude hazards

High altitude hazard controls

Partial pressure of gas in a mixture is equal to total pressu…

Decrease ability of blood to transport oxygen

Hypoxia, night vision, memory, judgement, coordination, drows…

Maintain partial pressure of oxygen near sea level by increas…

Dalton's law of partial pressure

Partial pressure of gas in a mixture is equal to total pressu…

Effect of low atmospheric pressure and…

Decrease ability of blood to transport oxygen

kinetic molecular theory

molecules

1st assumption of the KMT

2nd assumption of the KMT

properties of a gas could be explained by the assumption that…

the smallest particles into which an element or a compound ca…

gases are made up of mostly empty space

gas molecules are in constant, rapid, straight-line motion... th…

kinetic molecular theory

properties of a gas could be explained by the assumption that…

molecules

the smallest particles into which an element or a compound ca…

Air Pressure

Why doesn't your desk collapse under a…

Barometer

Mercury Barometer

-Pressure exterted by the weight of the air above due to the…

Air pressure is exerted **equally in all directions**... -The pres…

-Device Used to Measure Air Pressure... -Bar=pressure, metron=me…

-Pressure pushes down on exposed mercury, forcing it up into…

Air Pressure

-Pressure exterted by the weight of the air above due to the…

Why doesn't your desk collapse under a…

Air pressure is exerted **equally in all directions**... -The pres…

Peer Pressure

Manipulation

Guilt

Flattery

Influence people have on you. (Good or bad).

Way people exert peer pressure without concern for the person…

One way we manipulate

One way we manipulate

Peer Pressure

Influence people have on you. (Good or bad).

Manipulation

Way people exert peer pressure without concern for the person…

Pressure

Atmospheric pressure

PSIG

PSIA

The force exerted by a fluid (liquid or vapor) which has been…

Force exerted by the gases and vapor that make up the atmosph…

Pounds per square inch gauge

Pounds per square inch absolute

Pressure

The force exerted by a fluid (liquid or vapor) which has been…

Atmospheric pressure

Force exerted by the gases and vapor that make up the atmosph…

decreases

increases

increases

increases

As volume increases, pressure ________________

As temperature increases, pressure _______________

As the number of molecules increase, pressure ____________

As volume decreases, pressure _____________

decreases

As volume increases, pressure ________________

increases

As temperature increases, pressure _______________

Pressure definition

Pressure equation

Pressure conversions/units

Pascal definition

the collision force of gaseous species impinging upon the sur…

Pressure (P)= force of collision/area of collision

1 atm= 760 mm Hg= 760 torr= 101,325 Pa= 14.696 psi

Pascal (Pa)= kg/(m×s²)

Pressure definition

the collision force of gaseous species impinging upon the sur…

Pressure equation

Pressure (P)= force of collision/area of collision

Pressure

pressure equation

Fluid

gas

The force of molecules hitting against a surface divided by t…

Pressure = force/area ... Pascal = N/Msquared- pascal is the uni…

State of matter where molecules can easily flow

no definite volume, no definite shape (will expand to fit vol…

Pressure

The force of molecules hitting against a surface divided by t…

pressure equation

Pressure = force/area ... Pascal = N/Msquared- pascal is the uni…

atmosphere

atmospheric pressure

fluid

normal

The layer of gases that surround the Earth. The important gas…

The weight of air resting on the Earth's surface.

A substance that can flow, such as a liquid or a gas.

Acting at an angle of 90° to a surface or boundary.

atmosphere

The layer of gases that surround the Earth. The important gas…

atmospheric pressure

The weight of air resting on the Earth's surface.

Air Resistance

Terminal Velocity

Vacuum

Gravity

The friction of an object as it free falls through the atmosp…

Speed at which air resistance and gravity acting on a falling…

Empty space.

A force that pulls all objets toward each other, including yo…

Air Resistance

The friction of an object as it free falls through the atmosp…

Terminal Velocity

Speed at which air resistance and gravity acting on a falling…

Gases can be compressed because . . .

Fighting fire . . .

Hot-air balloons . . .

Fizzy drinks . . .

there is a lot of space between the particles.

Gases including carbon dioxide, have lots of space between th…

Hot-air balloons work on the idea that gases expand when heat…

All carbonated soft drinks contain carbon dioxide gas.... The g…

Gases can be compressed because . . .

there is a lot of space between the particles.

Fighting fire . . .

Gases including carbon dioxide, have lots of space between th…

atmospheric pressure

1013.25

dalton's law

isobars

force per unit area exerted by gases

average sea level pressure

sum of all partial pressure equals total pressure; the weight…

lines of equal pressure depicted on isobaric charts for analy…

atmospheric pressure

force per unit area exerted by gases

1013.25

average sea level pressure

Recipe for a cloud

Low pressure winds

Increasing temps

Temperature and Pressure relationship

Water evaporates, air rises, cools to dew point, expands, and…

Inward, counterclockwise, anticyclone

Expand

Indirect...as pressure goes up, temperature goes down

Recipe for a cloud

Water evaporates, air rises, cools to dew point, expands, and…

Low pressure winds

Inward, counterclockwise, anticyclone

Gas Pressure

Vacuum

Atmospheric Pressure

Barometers

The result of simultaneous collisions of upon billions of gas…

An empty space with no particles and no pressure

Force exerted by the weight of the air

Instruments used to measure air pressure are called

Gas Pressure

The result of simultaneous collisions of upon billions of gas…

Vacuum

An empty space with no particles and no pressure

Pressure

Formula for Pressure... Formula for Press…

One pascal = (Pa)

Force = F

is a measure of how much force is acting on a certain area, d…

Pressure = Force/area

is the pressure exerted by one newton ( 1N) of force on an ar…

Unit of measurement is N = newtons

Pressure

is a measure of how much force is acting on a certain area, d…

Formula for Pressure... Formula for Press…

Pressure = Force/area

Pressure

Hydrostatics

Communicating vessel

Barometer

Force per unit area.

Branch of Physics which studies pressure and equilibrium of f…

A set of containers which have the same fluid inside

An instrument that measures atmospheric pressure

Pressure

Force per unit area.

Hydrostatics

Branch of Physics which studies pressure and equilibrium of f…

As you travel further into the atmosph…

At 5 km the air pressure is about....

At 50 km the air pressure is about

Does air weight a lot?

Decreases

54 kPa

.15 kPa

Yes! Considering it weighs about 2 elephants per square meter…

As you travel further into the atmosph…

Decreases

At 5 km the air pressure is about....

54 kPa

What is pressure?

Pressure is affected by what two things?

What direction do solids press in?

What direction do liquids press in?

A force on a definite area.

The size of the force and the size of the area.

Only down.

All directions.

What is pressure?

A force on a definite area.

Pressure is affected by what two things?

The size of the force and the size of the area.