Earthquake waves are classified as P waves and S waves. Which of the following statements is true about these waves?
a. The P wave is transverse as is the S wave.
b. The P wave is longitudinal as is the S wave.
c. The P wave is transverse and the S wave is longitudinal.
d. The P wave is longitudinal and the S wave is transverse.
e. Both the P and S waves are mixtures of longitudinal and transverse waves.
d
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A) a deviation B) bias C) an error D) an uncertainty
A light ray, traveling obliquely to a concave mirror's surface, crosses the axis at the mirror's focal point before striking the mirror's surface. After reflection, this ray
A) travels parallel to the mirror's axis. B) travels at right angles to the mirror's axis. C) passes through the mirror's center of curvature. D) passes through the mirror's focal point. E) passes through the axis midway between the mirror's focal point and center of curvature.
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