Which of the following types of agents increases the viscosity of a suspension?
Mucilage
Thickening agent
Flocculating agent
Emulsifier
Thickening agent
Rationale: A thickening agent increases the viscosity of a suspension. The more "viscous" a suspension is, the thicker its consistency. A mucilage is a glue-like substance. A flocculating agent prevents particles from clumping together. An emulsifier stabilizes an emulsion.
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Which of the following statements about aging is true?
a. As people age they are certain to lose their memories. b. Verbal comprehension diminishes with aging. c. The ability to retrieve information from long-term memory may be slower. d. As a person ages it becomes more difficult for him or her to learn new things.
A regular rhythm is one in which the R-R intervals
A) vary by only one or two little blocks. B) are interrupted by premature beats. C) do not vary at all. D) are the same as the P-P intervals.