What maintains a forced wave?
a. Wavelength
b. Wind
c. Disturbing force
d. Restoring force
ANS: C
Forced waves need the continual disturbing force to sustain them. An example of a forced wave is the
ocean tide which rely on the gravitational attraction of the sun and moon. Information can be found in
the section Waves Are Classified by Their Physical Characteristics.
You might also like to view...
It is impossible for a country to have a negative rate of natural increase
Indicate whether this statement is true or false.
A large body of evidence indicates that human activities are enhancing the earth's natural greenhouse effect and changing the earth's climate.
Answer the following statement true (T) or false (F)
Which of the following is the most important factor influencing soil drainage?
A. Soil organic content B. Soil faunal content C. Soil texture D. Soil color
Figure 1.5 is a view of Earth from directly above the North Pole; the equator is the full circumference around the edge. A line has been drawn from the North Pole to the equator and labeled 0°, representing the prime meridian. Earth’s prime meridian through Greenwich, England, was not generally agreed to by most nations until 1884. To the right of 0° on the diagram is the Eastern Hemisphere, and to the left of 0° is the Western Hemisphere.
a) Label both the Eastern Hemisphere and the Western Hemisphere. b) Extend another line from the North Pole to the other side of Earth, opposite the prime meridian, and label it 180°. You now have marked the line that is the International Date Line, which extends from North to South Poles on the opposite side of Earth from the prime meridian. c) Using your protractor, measure, draw, and label the meridians that are 100° east and 60° west of the Greenwich meridian. d) Finally, locate, draw, and label the meridian that marks your present longitude.