chemistry

• visible matter, also called baryonic matter
• two types of properties of gasses are pressure and volume
• volume - space occupied by the gas molecules. the SI unit is Liters
• pressure - force exerted by the gas molecules per unit area. the SI unit is Pascal (Pa)
• barometer - used to measure atmospheric pleasure
• manometer - used measure gas pressure other than the atmosphere
• closed-tube manometer - used to measure pressure below atmospheric pressure
• open-tube manometer - used to measure pressure equal to or greater than the atmospheric pressure
• temperature - measure the average translational kinetic energy
• celsius to kelvin

  K = C + 273.15
• kelvin to celsius

  C = K - 273.15
• Fahrenheit to Celsius

  C= (F-32) 5/9
• Celsius to Fahrenheit

  F = C (9/5) + 32
• Fahrenheit to Kelvin

  K= (F-32) 5/9+ 273.15
• kelvin to fahrenheit

  F = (K-273.15) x 9/5 +32
• celsius degree - used for temperature differences
• degree celsius - used to indicate a single temperature
• The freezing point of water on the kelvin scale is 273.15 K