Physics with Calculus I

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Physics with Calculus I
5/27/04
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(No Transcript)
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Where weve been

• Newtons Laws of Motion
• Work Power
• Conservation of energy
• Conservation of momentum
• Rotational Motion
• Angular Momentum (L)
• Static Equilibrium
• Law of Gravitation
• Fluid Mechanics

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Ch 19 Introduction
Until now we have been dealing with the motion of
single objects and sometimes two, like in
collisions. When we deal with large numbers of
particles it is impossible to calculate
collisions and trajectories and keep track of
each one. So the properties of matter in bulk
(pressure, temperature, entropy, etc.) have to be
discovered by experiment and their relationships
to each other established. These quantities then
need to be related to the kinematic and dynamic
variables (momentum, energy, etc.), that we have
been studying up till now. We begin this chapter
be defining temperature and how materials behave
as temperature changes.
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Where were going
Ch 19 Temperature (19.1) Temperature and the
Zeroth Law of Thermodynamics (19.2, 19.3)
Temperature Scales (19.4) Thermal
Expansion (19.5) Macroscopic Description of Ideal
Gas
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(19.1) The Zeroth law of Thermodynamics
If Temp A Temp B
And Temp B Temp C
Then, Temp A Temp C
How Profound
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(19.2, 19.3)Temperature Scales
Kelvin is NOT in degrees
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(19.4) Thermal Expansion

• ? coefficient of thermal expansion
• Table 19.1 page 588

Example
The object changes by 24 parts per million for
each change in o C
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(19.4) Thermal Expansion
Problem 19.9
And, of course, Area is just an expansion in 2-D
Approximate For Area Volume
And obviously, for Volume
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(19.4) Thermal Expansion
Graph of water expansion
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(19.5) Macroscopic Description of Ideal Gas

• A Mole is an amount of a substance
• 2. A Mole is an amount of a substance that
  contains as many elementary entities (atoms) as
  there are atoms in 12 g of carbon-12
• 3. A Mole of a gas contains the same of
  molecules as Avagadros Number (NA)

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(19.5) Macroscopic Description of Ideal Gas
m mass M molecular weight (mass ?) n of
Mole
Now, for an IDEAL gas
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(19.5) Macroscopic Description of Ideal Gas,
contd
Problem 19.38
Problem 19.42
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The End