When sound travels faster at ground level than higher in the air, sound tends to bend
A) upward.
B) downward.
C) neither of these
Answer: A
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When tilted or folded sedimentary layers are covered by younger, horizontal rock layers it is called
A) an intrusion. B) an angular unconformity. C) a syncline. D) conformable.
The explanation of the behavior of light based on the ray model is called "geometric optics."
Indicate whether the statement is true or false
A 2.0-kg object moving 3.0 m/s strikes a 1.0-kg object initially at rest. Immediately after the collision, the 2.0-kg object has a velocity of 1.5 m/s directed 30° from its initial direction of motion. What is the y component of the velocity of the 1.0-kg object just after the collision?
a. ?3.7 m/s b. ?3.4 m/s c. ?1.5 m/s d. ?2.4 m/s e. ?4.1 m/s