A magnetic field can occur in a current-carrying coil of wire
A. only if the current changes.
B. with or without a contained piece of iron.
C. if it contains a piece of iron.
D. none of the above
Answer: B
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Give examples of features in your life that would be symbolized by points, arcs, and polygons.
What will be an ideal response?
The advantage of effluent sewerage is that
A. Since solids are digested like a septic system, the effluent can be used as fertilizer B. Families can do all their processing at home C. Since solids remain in the liquid, disposal is easy and cheap D. Large, expensive municipal systems are no longer needed E. Since solids are removed, pipes and pumps to the central treatment plant can be small and cheap
Bisphenol A is most often found in ________
A) metals B) plastics C) wood D) glass
What ideas brought a renewed interest to the idea of continental drift?
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