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chapter10-web1 - Scales –Example 1 A pan of water is...

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1 Chapter 10 Thermal Physics 1. Temperature and the zeroth Law of Thermodynamics 2. Thermometers and Temperature Scales 3. Thermal Expansion
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2 Thermal Physics square6 What is Thermal Physics? square6 What is Heat? square6 What is Thermal Contact? square6 What is Thermal Equilibrium?
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3 Zeroth Law of Thermodynamics square6 If objects A and B are separately in thermal equilibrium with a third object, C, then A and B are in thermal equilibrium with each other. square6 Allows a definition of temperature
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4 Thermometers square6 What is a thermometer? square6 A Mercury thermometer square6 Gas thermometer
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5 Temperature Scales square6 How does one define a temperature Scale? square6 The Celsius scale square6 The Fahrenheit scale square6 The Kelvin scale
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6 Kelvin Scale square6 Why do we need this scale? square6 What is first point? square6 What is triple point?
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7 Some Kelvin Temperatures square6 Some representative Kelvin temperatures square6 Note, this scale is logarithmic square6 Absolute zero has never been reached
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8 Converting Among Temperature Scales ( ) 273.15 9 32 5 5 32 9 9 5 C K F C C F F
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Unformatted text preview: Scales –Example 1. A pan of water is heated from 25 °C to 80 °C. What is the change in temperature on the Kelvin scale and on the Fahrenheit scale? 10 Thermal Expansion s What is thermal expansion? s Linear Expansion s Area expansion s Volume expansion 11 Applications of Thermal Expansion – Bimetallic Strip s Thermostats s Use a bimetallic strip s Two metals expand differently s Since they have different coefficients of expansion 12 Thermal Expansion – Example 1. A steel railroad track has a length of 30.00 m when the temperature is 0°C. What is its length on a hot day when the temperature is 40°C? 13 Thermal Expansion – Example 1. A hole of cross-sectional area 100.00 cm 2 is cut in a piece of steel at 20°C. What is the area of the hole if the steel is heated from 20°C to 100°C? 14 Unusual Behavior of Water...
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