Subject > Physics > Physics I > Heat

Heat

Relative Humidity

Usually the amount of water vapor is less than the absolute value at a given temperature.

Relative humidity is defined as the ratio of the actual amount of water vapor in the atmosphere to the absolute humidity at that temperature.

For example, suppose air contains 10 g of humidity per cubic meter at 25^oC, then

relative humidity = 10/23 = 0.435 or 43% humidity.

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	Introduction
	Sources of Heat
	Heat and Temperature
	Measurement of Temperature
	Scales of Temperature
	Kelvin Scale of Temperature
	Heat and Motion (Kinetic Theory of Heat)
	Unit of Heat Energy
	Heat Capacity or Thermal Capacity
	Specific Heat
	Calorimetry
	Effects of Heat
	Expansion of Matter
	Linear Expansion
	Superficial or Area Expansion
	Cubical or Volume Expansion
	Expansion of Liquids
	Expansion of Gases
	States of Matter
	Latent Heat
	Evaporation
	Humidity
	Relative Humidity
Animations
	Galileo's Gas Thermometer
	Mercury Thermometer
	Calibration of a Thermometer
	Different Scales of Temperature
	Different Scales of Temperature
	Kinetic Molecular Theory of Matter
	Thermal Equilibrium
	Mass Dependence of Heat Capacity
	Heat Capacity and Nature of Substance
	Temperature Dependence of Heat Capacity
	Specific Heat Capacity of a Solid
	Mechanical Equivalent of Heat
	Specific Heat Capacity of a Solid
	Heat
	Advantages of High Specific Heat Capacity of Water
	Calorimeter
	Effect of Heating
	Solids Expand on Heating and Contract on Cooling
	Applications of Thermal Expansion and Contraction of Solids
	Change of State and Specific Latent Heat
	Determination of the Specific Latent Heat Capacity of Fusion
	Consequences of Latent Heat of Fusion of Ice
	Change of State
	Evaporation Causes Cooling
	Difference Between Evaporation and Vaporisation

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Math
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