Bio

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Bio

• Sylvester Stallone

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Screenwriter Actor
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"My films are always about a lone man
rising above his oppressors. It's a
formula I believe in . . ."
--Sylvester Stallone
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Stallone lived in foster homes
until the age of 5.

• kicked out of more than 10 schools
  because of behavioral problems. He
  was even named "Most Likely to End Up in the
  Electric Chair" by his classmates in his
  yearbook.

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Stallone was dirt poor working as a part time
actor part time waiter

• He was offered 300,000 for his screenplay Rocky
  but said only if he could play rocky

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• Stallone wrote the screenplay to Rocky
• (1976), the film that would make
  him a star, in just three days. Rocky won
• Academy Awards for Best Picture
  and Best Director (John G. Avildsen), and
• Stallone was nominated for Best
  Actor and Best Original Screenplay.

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homework

• Read pages 416 - 422
• Problems
• 1-12 page 422
•  

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Check homework
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Mars Rover

• Dirt is clumping so it may indicate water
• Why?

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Liquid gas equilibrium
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Solid liquid equilibruim
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Quiz 35
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AS we study chemistry we see that one of the
three forms of matter GASES react very radically
to different conditions
So radically they a study in themselves
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Gasses have always been mysterious, we see what
they do not what they are
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• Wind surfing
• Sailing
• Flying of bird

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Not until these gas molecules are forced to slow
down and condense do we actually see them or
until they act on something else
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Gases apply force to solids liquids and gases
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Gases not only move large things like boats and
people, gases Propel small materials
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When gases clump or undergo synthesis they become
larger and become visible
Reverse sublimation
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Nearly all Gases, unlike solids or liquids have
what are known as special properties
density

• Special properties of gases
• Invisible
• Compressible
• Low density
• Fill the container

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Most are invisible

• Which ones are not
• smoke from a fire
• Iodine
• Chlorine
• Bromine

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Why are most gases invisible

• There is a lot of room between molecules so light
  goes between the molecules making it seem that
  they dont exist
• There electronic makeup is such that they dont
  clump but instead remain separate
• This tendency to separate is called volatility

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Why are some gases like chlorine Iodine and
Bromine gas visible

• What do atoms like Iodine Bromine and chlorine
  have in common?

What about hydrogen oxygen and nitrogen
Size matters
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These special properties of gases (invisible, low
density, compressibility) are easily
influenced by

• Pressure
• Temperature
• Volume
• Number of particles present

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Temperature
How would increased temp effect the density of
the gas

• Movement of particles

When you feel a piece of metal and it is hot what
you are feeling is the degree of the movement of
molecules
Volume
How would increased volume effect the density of
the gas
The amount of area a gas exists in
When you change the volume you change the density
which alters the visibility and stifles the
movement of the gas
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Number of particles present

• Actual Number of atoms molecules or compounds or
  the actual number of moles of atoms, molecules,
  or compounds in a specific volume

Changing the number of particles changes the
density
pressure
Energy with which the gas is striking its
environment Sail boat ear drum balloon
Force per unit area
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Force vs pressure
Whats the differance

• Force is a particular amount of energy
• Pressure is that energy being applied to a
  specific area
• Does that matter you bet

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Show pencil on hand
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(No Transcript)
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How does a knife work
Opposite from camels feet
One kilogram wedge
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PRINCIPLE OF SNOW SHOES

• The more surface area, the less amount of force
  placed on a given point.

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TRADITIONAL ICE PICKS
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Note the ice pick
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PRESSURE

• Force applied uniformly over a surface, measured
  as force per unit of area

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(No Transcript)
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Pressure force/area

• Increase area decrease pressure
• Increase force increase pressure
• Decrease area increase pressure

Kilograms per square cm
psi
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Unit of pressure is the pascal

• Pascal one newton per square meter

A newton force required to accelerate a mass of
one kilogram one meter per second per second,
Air pressure at sea level 101,300 pascal
101 kpa
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Are the properties of solids and liquids immune
to the effects of pressure, volume, number of
atoms or temperature?
Can you crush a solid cube of steel or squeeze
water?
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• Consider carbon dust coal graphite and diamonds

Black hole
But gases are incredibly sensitive to these
influences so sensitive we see these effects
everywhere
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To explain the way gases respond to Pressure,
number of elements volume and heat scientists
have developed what they call the

• Kinetic molecular theory

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Kinetic molecular theory states that all
properties of gases are due to the kinetic energy
contained in the individual atoms or molecules of
a gas
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Kinetic molecular theory

• What is Kinetic energy

The amount of kinetic energy something has is
dependent on what 2 factors??????
Mass and velocity
Ke ½ MV2
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Kinetic molecular theory attempts to explain the
pressure, flow and compressibility that gases
apply to things around us.
Something is holding the walls of a balloon
out Something is knocking down a palm
tree Something has pushed the propellers of a pin
wheel or pulled by a planes propellers
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Kinetic molecular theory explains the force
applied to an object by a gas
temperature

• This greater speed with which gas molecules smack
  a surface the more force is applied.
• and
• The more particles impacting a surface the force
  that is applied

of particles
volume
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The Kinetic molecular theory
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The Kinetic molecular theory
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The Kinetic molecular theory
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Show how a tennis ball will move a block,

• Double the speed or throw two balls

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Imagine sheet being levitated by tennis balls