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.
Gas Laws Inquiry Lab. Introduction. Four key variables are used to define an ideal gas: pressure, volume, temperature, and quantity (moles). Pressure and temperature can be measured directly using scientific devices, while quantity and volume required additional manipulations.