Bolt tensioners are devices designed to apply a specific tension to a bolt. The device may be either removed once the actual nut is threaded into place, or left in place, in the case of a hydraulic nut.
The metric system does away with all of the different units of volume used in the English system, and instead, uses only one unit to measure volume. That unit is called the liter. Materials Needed: Meter stick or metric ruler; stiff cardboard such as poster board; scissors or hobby knife; tape.
To help you appreciate the magnitudes of these units, hereare the volumes of some familiar objects:Chicken egg 60 mLOne breath of air 500 cm 3 Coke can 355 mLScientists often measure volumes with pipets and graduatedcylinders. Pipets are used to measure small volumes, typi-cally 25 mL or less.