Which of the Following Statements About Life Expectancy Is True

question 10

Multiple Choice

Which of the following statements about life expectancy is true?

• A) The gender gap in life expectancy has widened in industrialized nations since the early 1970s.
• B) In the United States, an African-American child born in 2010 is likely to live 3 to 6 years longer than a Caucasian child.
• C) Length and quality of life can be predicted by a country's health care, housing, and social services, along with lifestyle factors.
• D) When researchers estimate average healthy life expectancy, the United States ranks first among industrialized nations.

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Definitions:

C=C Stretching

A vibrational movement in infrared spectroscopy, where the carbon-carbon double bond length changes, useful in identifying unsaturated compounds.

Wavenumber

The reciprocal of the wavelength of a wave, often used in spectroscopy to describe the energy levels of molecules.

Intense IR Absorption

A strong absorption of infrared light, indicating the presence of certain bond vibrations within a molecule, observed in infrared spectroscopy.

IR Spectroscopy

A technique that involves the interaction of infrared radiation with matter, primarily used to identify and study chemicals through their vibration and rotation.