Many Years Ago,telephone Numbers Had Only Four or Five Digits

question 49

Multiple Choice

Many years ago,telephone numbers had only four or five digits.Even now,no more than seven digits are used for phone numbers.The most reasonable psychological explanation for this is that ________________.

• A)there is a direct relationship between the number of items in the sensory registers and their retention
• B)there is an inverse relationship between the number of items in the sensory registers and their retention
• C)there is a direct relationship between the number of items in short-term memory and their retention
• D)there is an inverse relationship between the number of items in short-term memory and their retention

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Definitions:

Monomer Units

Individual, small molecules that can bind chemically to other monomers to form polymers through repeated sequences.

Repeating Segment

A consistent sequence of atoms or groups within a polymer that repeats along its chain.

Nylon 6,6

A type of polyamide made by polymerizing hexamethylene diamine and adipic acid, known for its strong, elastic, and resistant properties, used in textiles and engineering plastics.

Monomers

Simple molecules that can undergo polymerization to form more complex molecules called polymers, serving as the building blocks for a variety of macromolecules.