ToQuaternion[q] transforms q into a Quaternion object if possible.

UnitQuaternionQ[q] gives True if q is a unit quaternion and False otherwise.

Atto is the SI unit prefix denoting 10 -18.

Centi is the SI unit prefix denoting 10 -2.

CGS[expr] converts expr to CGS units (centimeter/gram/second).

Deca is the SI unit prefix denoting 10^1.

Deci is the SI unit prefix denoting 1/10.

Dozen is a unit multiplier.

Exa is the SI unit prefix denoting 10^18.

Femto is the SI unit prefix denoting 10 -15.