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Earth's polar ice caps, sea ice, glaciers, snow cover, and permafrost make up which sphere?
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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 sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects
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1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.
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Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2
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Earth's polar ice caps, sea ice, glaciers, snow cover, and permafrost make up which sphere?...
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