The Average Height of a Column of Mercury (Hg) in a Barometer

question 118

Multiple Choice

The average height of a column of mercury (Hg) in a barometer at sea level is

• A) 760 mm (76 cm).
• B) 1013 inches.
• C) something that can not be determined without knowing air temperature.
• D) 29.00 millibars.

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Definitions:

Operating Quadrants

The four potential modes of operation for a drive or motor, determined by the direction of torque and rotation or direction of current and voltage.

Torque

A measure of the force that can cause an object to rotate about an axis. It is a major consideration in machine design and operation.

Rotation

The act or process of moving or turning around a central axis or point.

Four Stages

Describes a process or system that is divided into four distinct phases or levels of operation.