The unit is simply a particular example of the quantity concerned which is used as a reference, and the number is the ratio of the value of the quantity to the unit.

This appendix presents the SI and English (imperial) units, which are used in various areas of trans-portation engineering, and their conversion factors. Some metric units and factors that are not listed …

All quantities (mass, length, density, speed, force, pressure, energy, power) listed in these conversion tables can be ultimately expressed in the following three basic units: M = mass, L = length, T = time. …

In the above examples, we cross canceled the like unit from the numerator and denominator, just like we would cancel common factors when reducing fractions. This makes it easy to see which units we end …

pounds per square inch (psi) =

By fixing the exact numerical value, the unit becomes defined, since the product of the numerical value and the unit has to equal the value of the constant, which is postulated to be invariant.

Conversion Practice Worksheet For questions 1 9, be sure to . in. lude units in your answers! 1. Example: How . . rams are in 1 kilogram? 2. How . ny. grams are in 1 milligram? 3. How m. y . …