1 | Term | Quick Definition | Formula | Common Units |
---|---|---|---|---|

2 | Pressure | Force (F) applied over some area (A) | P=F/A | psi, kPa, kg/cm2, bar |

3 | Mass | The amount of matter in an object | M | g, kg(m), lbs(m) |

4 | Gravity | An attraction (a) that works on a mass (M) | a | ft/sec2, m/sec2 |

5 | Weight | Force on a mass (M) due to gravity (a) | F=M*a | lbs, kg(f), Newton, ton |

6 | Area | Two dimensional space | A | in2, ft2, cm2, m2 |

7 | Force | Mass under the influence of acceleration (a) | F=M*a | lbs, kg(f), Newton, ton |

8 | Flow | Change in mass or volume over time (t) | L=V/t or M/t | cfm, gpm, lbs/hr |

9 | Volume | Three dimensional space | V | in3, ft3, cm3, m3 |

10 | Density | Amount of mass (M) in a volume (V) | D=M/V | lbs/ft3, g/cm3, kg/m3 |

11 | Liquid | Incompressible state where matter flows | e.g. water at STP | |

12 | Gas | Compressible state where matter disperses | e.g. air, nitrogen at STP | |

13 | STP | Standard temperature and pressure | 68 deg. F, 14.7 psia |