Fundamental Physics/Heat

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Heat[edit]

Heat comes from heat sources such as

Temperature[edit]

Temperature is the characteristic of Heat . An indication of heat intensity . High temperature indicates hot sensation . Low temperature indicates cold sensation . Temperture is denoted as T measured in degree o

Temperature measurement systems[edit]

There are 3 Temperature measurement systems namely


conversion between these systems of temperature can be done as shown below

Convert from to Formulas
Fahrenheit Celsius °C = (°F – 32) / 1.8
Celsius Fahrenheit °F = °C × 1.8 + 32
Fahrenheit kelvin K = (°F – 32) / 1.8 + 273.15
kelvin Fahrenheit °F = (K – 273.15) × 1.8 + 32

Standard Temperatures[edit]

Standard Temperatures Degree C Degree F Degree K
Frozen temperature 0 oC
Boiling temperature 100oC
Room temperature 25oC

Heat and Matter[edit]

Observations indicate that

  • Dark and thin matter is easy to absorb heat energy than light and thick matter
Dark and thin clothes dry faster than bright and thick clothes
  • Heat travels from high temperature to low temperature
Heat always travel from hot water to cold water
  • Heat transfer through 3 states of matter Solid, Liquid and Gas through 3 phases Heat conduction, Heat convection and Heat radiation

Heat Absorbtion laws[edit]

First Law[edit]

Heat flows from high temperature to low temperature
heat transferes from T2 to T1
heat transferes from T1 to T2
no heat transfer

Second Law[edit]

Heat interact with matter to create change in matter's temperature

If temperature of matter is at To . Matter's temperature change to T1 when matter interacts with heat . Then, change inn matter's temperature

Third Law[edit]

Heat energy absorb by matter is directly proportional with matter's mass, change in matter's temperature and matter's capability to absord heat

IV Law[edit]

Heat transfer between 2 objects of different mass

Heat energy absorb by mass 1

Heat energy absorb by mass 2

Heat Transfer[edit]

Heat transfer through matter in 3 phases Heat conduction, Heat convection and Heat radiation

Heat conduction . Matter change its temperature when it is in contact with heat energy

Heat convection . Matter absorbs heat energy to its maximum level and gives off visible light

Heat radiation . Matter absorbs heat energy to its maximum level and gives off free electron

when

Electric Heat[edit]

Ohms law voltage source.svg

Experiment has shown that conductor interacts with electricity can create heat energy

With

for electric conductor
for electric conductor

Electromagnetic Heat[edit]

Experiment has shown that magnetic material interacts with electricity can create heat energy as photon of electromagnetic oscillation wave radiation

at
at about 2fo and above

Applications[edit]

Natural phenomenon occurs in nature like

  1. Wind
  2. Weather
  3. Climate

Electronics component that converts heat energy to electrical energy

  1. Thermistor

Electric machines that converts heat energy to electrical energy

  1. Electric Heater
  2. Freezer, Refrigerator
  3. Water Boiler

Reference[edit]