Since 1983 the Standard Meter Has Been Defined in Terms

question 18

Multiple Choice

Since 1983 the standard meter has been defined in terms of which of the following?​

• A)specific alloy bar housed at Sevres,France
• B)wavelength of light emitted by krypton-86
• C)distance from the Earth's equator to the North Pole
• D)the distance light travels in a certain fraction of a second
• E)None of the above

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Definitions:

Area

A measure of the extent of a two-dimensional surface or shape, expressed in square units.

Atmospheric Pressure

The pressure exerted by the weight of the atmosphere above a point, affecting weather patterns and boiling temperatures of liquids.

Sea Level

The average height of the ocean's surface between high and low tide; used as a standard base for measuring elevations.

Inches Hg

A unit of pressure measurement equivalent to inches of mercury, commonly used in aviation and weather forecasting.