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A Speedboat Moving at 20

question 86

Multiple Choice

A speedboat moving at 20.6 m/s sounds a signal on its horn,producing a tone of 320 Hz.There is no wind,and the speed of sound in air is 329 m/s.The apparent frequency of the sound heard by an observer in another boat moving in the opposite direction and approaching the first at a speed of 15.4 m/s is

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Social Security

A government program that provides financial assistance to people with an inadequate or no income, especially the elderly and disabled.

Payroll Taxes

Levies placed on either employers or employees, typically based on a proportion of the wages that staff receive from their employers.

Temperance

Moderation or self-restraint, especially in eating and drinking.

Prohibition

The period during which the manufacture, sale, and transportation of alcoholic beverages were banned in the United States through the 18th Amendment to the Constitution (1920-1933).