Let's imagine that you were going to start a company that produces spectroscopes to sell to general chemistry students. how could you ensure that all the spectroscopes created the same calibration line and equation? what would you need to be sure it was always the same? what could be changed without affecting the calibration?

In order to ensure that all the spectrosocpes created the same calibration line and equation, one must follow National Institute of Standards and Technology (NIST) standards for comparison.

NIST is authorized to issue certificate for calibration which certifies that the calibration line and equation are upto the standards decided.

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.