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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What will be an ideal response?
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
The explanation of the behavior of light based on the ray model is called "geometric optics."
Indicate whether the statement is true or false
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.