The force with which air molecules move determines _____, which is measured in units of _____ as _____

a) loudness; decibels; amplitude.
b) frequency; hertz; timbre.
c) timbre; vibrations; amplitude.
d) saturation; frequencies; hertz.

Answer: a

Psychology

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An 11-month-old baby is likely to display both fear of strangers and separation anxiety

Indicate whether this statement is true or false.

Psychology

Marina is 9 years old and is capable of concrete operational thought. Like most other children her age, she should __________________

a. pass the three mountain task, but fail the abstract thinking task b. still have great difficulty with seriation tasks, such as arranging items from shortest to longest c. be able to organize and manipulate information mentally d. think in terms of hypotheticals

Psychology