Physics Course/Heat

Sources of Heat
Generally, Heats come from different sources
 * Fire.
 * Chemical Reaction between two flammable or combustible materials


 * Celestial Body's Lights 
 * Sun light produce Heat as a Light of hot temperature. Moon Light produce Heat as a Light of Cold Temperature


 * Electric Light 
 * Conductors when conduct current will change their body temperatures and release Heat Energy and Light

Heat
Heat is caused by friction . When rubbing two objects the object bodies will change in temperatures which produces Heat.

Temperature
Temperature is a measured of Heat denoted as T measured in Degree . There are three system of temperature measurements namely Degree C, Degree F , Degree K


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! System of Measuring Temperature !! Temperature of Freezing Point|| Temperature of Boiling Point  || Room Temperature
 * Degree C|| 0o || 100o || 25o
 * Degree F || 32o || 212o || 77o
 * Degree K || 273.16 || 373.16 || 298.16
 * }
 * Degree K || 273.16 || 373.16 || 298.16
 * }
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Heat and Matters
An object when absorbs heat exhibit the followings
 * 1) Change in object's Temperature
 * 2) Change object's state or form
 * 3) Release Heat's Energy in the surrounding as Light

When an object absorbs Heat's Energy, it will change its temperature and either expand or shrink itself.
 * For example, Electric wire shrink in the winter and expand in the summer.

First Law of Thermodynamic
When an object absorbs heat's energy it will expand or shrink 


 * If an object has a Mass m at the normal temperature of To . When this object absorbs heat's energy it will change its body temperature to T . Therefore the change in temperature of the object is T - To . If the object has an absorption constant of C then Heat Transfer can be calculated as
 * Q = m C (T - To) = m C ΔT

Second Law of Thermodynamic
Heat transfer from objects that has a high temperature to object that has a low temperture
 * E = 0 When $$T_1 = T_2$$
 * E > 0 When $$T_1 > T_2$$
 * E < 0 When $$T_1 < T_2$$

Summary
Heat comes from differenct sources namely Fire, Light , Electric or from collision of two objects . Temperature is a measured of Heat denoted as T measured in Degree .

There are three system of temperature measurements namely Degree C, Degree F , Degree K


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! System of Measuring Temperature !! Temperature of || Temperature of  || Room Temperature
 * Degree C|| 0o || 100o || 25o
 * Degree F ||  || ||
 * Degree K ||  || ||
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 * Degree K ||  || ||
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The laws govern Thermaldynamic of Heat transfer are listed in the table below


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! Thermodynamic Law !! Heat Transfer !! Formula
 * Thermodynamic First Law || Heat is absorbed by matter that either make matter to shrink or to expand  || Q = m c (T - To)
 * Thermodynamic Second Law ||  Heat transfer from High temperature to low temperature . From Hot to Cold || E = Q1 - Q2 khi T1 > T2 E = Q2 - Q1 khi T2 > T1
 * }
 * Thermodynamic Second Law ||  Heat transfer from High temperature to low temperature . From Hot to Cold || E = Q1 - Q2 khi T1 > T2 E = Q2 - Q1 khi T2 > T1
 * }
 * }

Reference

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