The equilibrium rule, ?F = 0, applies to
A. objects or systems in uniform motion in a straight line.
B. objects or systems at rest.
C. both of the above
D. none of the above
Answer: C
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Diffraction is a property of
A. earthquake waves. B. sound. C. light. D. all of the above
Explain the difference between the physical distance and the cost distance in distance measure operations.
What will be an ideal response?
The presence of coliform bacteria in a source of drinking water indicates
A. that it has been contaminated with human or animal waste. B. that it has a high biochemical oxygen demand. C. that it contains toxic materials. D. All of these are correct statements.
Why was the feeding strategy of Riftia worms such a mystery to scientists when they were first
discovered? a. These worms have no mouth. b. These worms have no digestive tract. c. These worms have no anus. d. All of these choices