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Which of the following can create a magnetic field? A. a coil of wire B. an electric current C. hitting a magnet with a hammer D. holding a magnet over iron filings
D
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User: Which of the following can create a magnetic field? A. a coil of wire B. an electric current C. hitting a magnet with a hammer D. holding a magnet over iron filings

Weegy: D
greatromances|Points 840|

User: What is the difference between an electromagnet and a bar magnet? A. A bar magnet's magnetic field is a perfect circle. B. A bar magnet weighs less than an electromagnet. C. An electromagnet's magnetic field can be switched on and off. D. An electromagnet has only one pole while a bar magnet has two.

Weegy: A. A bar magnet's magnetic field is a perfect circle.
Expert answered|andrewpallarca|Points 13584|



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Asked 7/28/2012 11:22:41 AM
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What would MOST LIKELY occur if a plague killed most of the prey organisms within a once-healthy ecosystem? A. The number of consumers would increase. B. The number of scavengers would increase. C. The number of predators would decrease. D. The number of producers would decrease.
Weegy: B.The number of scavengers would increase. User: In a stable ecosystem, what would MOST LIKELY happen if the population size of producers were reduced? A. There would be an increase in scavengers. B. There would be a decrease in competition. C. There would be a decrease in consumers. D. There would be an increase in predators. Weegy: B.The number of scavengers would increase. User: In a stable ecosystem, what would MOST LIKELY happen if the population size of producers were reduced? A. There would be an increase in scavengers. B. There would be a decrease in competition. C. There would be a decrease in consumers. D. There would be an increase in predators. Weegy: In a stable ecosystem, what would MOST LIKELY happen if the population size of producers were reduced? A. There would be an increase in scavengers. (More)
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Expert Answered
Asked 7/28/2012 3:28:26 PM
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