A Student Makes Several Measurements of the Density of an Unknown

question 50

Multiple Choice

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

• A)accuracy.
• B)precision.
• C)systematic error.
• D)determinate error.
• E)human error.

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Definitions:

Transmission of Infection

The spread of contagious diseases from one person or organism to another by direct or indirect contact.

Hand Hygiene

Practices to clean hands for the purpose of removing soil, dirt, and microorganisms to prevent infection.

Disposable Gloves

These are gloves designed for single use and intended to reduce the risk of contamination or infection.

Isolation Precautions

Strategies and practices designed to prevent the spread of infectious agents from person to person, especially in healthcare settings.