What effect does temperature and pressure have on the speed of sound when entering seawater?
a. The speed of sound increases as temperature and pressure decreases.
b. The speed of sound increases with temperature increases, but decreases with pressure.
c. The speed of sound decreases as temperature and pressure decrease.
d. The speed of sound is impacted by pressure but not temperature.
ANS: C
The speed of sound has a direct correlation with temperature and pressure. Sound travels faster in
warm surface waters than in deeper, cold waters. After the sound reaches a minimum level, the speed
of sound begins to increase again. Information can be found in the section Sound Travels Much
Farther Than Light through the Ocean
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a. 54% b. 34% c. 44% d. 24% e. 84%
What percentage of synthetic chemicals commonly used today has been adequately tested to determine if they are mutagen, carcinogen, or teratogen?
a. almost 90% b. 75% c. 50% d. 25% e. 2%
When you push on a car with twice the force for twice the time, you impart
A. twice the impulse. B. half the impulse. C. four times the impulse. D. one-fourth the impulse.
Carl and Don run separate chemical fertilizer manufacturing companies in the same industrial park. Both pollute the river flowing through the industrial park with debris and waste from their manufacturing processes. In the table below, the first row shows the current level of debris and waste each produces that makes its way into the river. The information in the table also indicates how much it would cost each manufacturer to reduce its pollution by additional increments of 10 pounds. If the government imposes a pollution tax of $7 for each 10 pounds of debris, total pollution will fall by ____ pounds, at a total cost of ____.
A. 40; $28 B. 40; $17 C. 40; $22 D. 60; $30