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.
How do scientists measure length volume Mass and density? Length is measured with a ruler, or any kind of object with measurements on it. Volume is measured in two ways: If it's a liquid, it is poured into a container with measureâ¦ments on it.