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Physics, 21.06.2019 17:00
Why is alternating current more effective at long–distance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.
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How is the gravitational force related to the distance between two objects?
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How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n
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Physics, 22.06.2019 16:00
The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?
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Children and adolescents should do hour or more of physical activity every day. a 5 b 7 c 3 d 1...
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