# Examples of derived quantities

Contents

## What is a derived quantity give three examples?

**Derived quantities**are

**quantities**that are calculated from two or more measurements. Many

**derived quantities**are calculated in physical science.

**Three examples**are area,

**volume**, and density.

## How many derived quantities are there?

For convenience, certain coherent

**derived units**have been given special names and symbols.**There**are 22 such**units**(see Table below).**Derived units** with special names and symbols.

Derived quantity |
energy, work, amount of heat |
---|---|

SI coherent derived unit |
joule |

J | |

N m | |

m^{2} kg s^{–}^{2} |

## What is a derived unit list an example?

Examples of derived quantities and units

Name | Symbol | Expression in terms of SI base units |
---|---|---|

joule per square metre | J/m^{2} |
kg⋅s^{−}^{2} |

kilogram square metre | kg⋅m^{2} |
m^{2}⋅kg |

newton metre second per kilogram | N⋅m⋅s/kg | m^{2}⋅s^{−}^{1} |

watt per steradian | W/sr | m^{2}⋅kg⋅s^{−}^{3} |

## What are the examples for basic units and derived units?

The

**SI derived units**for these**derived quantities**are obtained from these equations and the seven**SI base units**.**Basic** and **Derived Units**.

Derived Quantity |
Name | Expression in terms of SI units |
---|---|---|

pressure | pascal | m-1·kg·s-2 |

energy, work | joule (J) N-m | m2·kg·s-2 |

electric potential | volt (V) | m2·kg·s-3·A-1 |

current density | ampere per square meter | A/m-2 |