| As an SI derived unit, it is used by most countries in the world. |
| The present paper solves the derived unit cell problems and obtains expressions for such effective coefficients as piezomagnetic, piezoelectric, elastic and many others. |
| The SI unit of area is the square metre, which is considered an SI derived unit. |
| The SI derived unit of energy, the joule, is named after James Joule. |
| In this respect time is not a base unit but a derived unit, which is created from motion and speed. |
| The mechanical engineering units are derived from these, and the most important derived unit is the unit of force. |
