How Many Significant Digits Are Justified by the Unit Factor

question 141

Multiple Choice

How many significant digits are justified by the unit factor 1 lb/454 g?

• A)1
• B)2
• C)3
• D)infinite
• E)impossible to determine

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Definitions:

National Priority List

A list in the United States that identifies sites that are priorities for investigation and cleanup because they release or threaten to release hazardous substances.

Comprehensive Environmental Response, Compensation, and Liability Act

A U.S. federal law, established to clean up sites contaminated with hazardous substances and pollutants.

Alpha Particle

A type of ionizing radiation consisting of two protons and two neutrons, emitted from the nucleus of an atom during radioactive decay.

Atomic Nucleus

The central core of an atom, containing protons and neutrons and holding most of the atom's mass.