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A balance having one arm 10 times the length of the other, so that heavy objects can be weighed by using light weights.



Related Terms

CHARACTERISTIC PHASE

Of a light, the sequence and length of light and dark periods by which a navigational light is identified, i.e., whether fixed, flashing, interrupted quick flashing, etc.

CHARACTERISTICS OF A LIGHT

The sequence and length of light and dark periods and the color or colors by which a navigational light is identified.

MACROANALYTICAL BALANCE

A relatively large type of analytical balance that can weigh loads of up to 200 grams to the nearest 0.1 milligram.

FORKLIFT

A machine, usually powered by hydraulic means, consisting of two or more prongs which can be raised and lowered and are inserted under heavy materials or objects for hoisting and moving them.

DUTCHMAN'S LOG

A buoyant object thrown overboard to determine the speed of a vessel; the time required for a known length of the vessel to pass the object is measured, and the speed can then be computed.

CONE CLASSIFIER

Inverted-cone device for the separation of heavy particulates (such as sand, ore, or other mineral matter) from a liquid stream; feed enters the top of the cone, heavy particles settle to the bottom where they can be withdrawn, and liquid overflows the top edge, carrying the smaller particles or those of lower gravity over the rim; used in the mining and chemical industries.

INJECTION LUMINESCENT DIODE

Gallium arsenide diode, operating in either the laser or the noncoherent mode, that can be used as a visible or near-infrared light source for triggering such devices as light-activated switches.

PHOSPHORESCENCE

Emission of light without sensible heat, particularly as a result of but continuing after absorption of radiation from some other source. PERSISTENCE is the length of time during which phosphorescence takes place. The emission of light or other radiant energy as a result of and only during absorption of radiation from some other source is called FLUORESCENCE.

DYNAMICAL SIMILARITY

Two flow fields are dynamically similar if one can be transformed into the other by a change of length and velocity scales. All dimensionless numbers of the flows must be the same.

DRILL CAPACITY

The length of drill rod of specified size that the hoist on a diamond or rotary drill can lift or that the brake can hold on a single line.

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