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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 does an observation about an object differ from an inference about that object
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Physics, 22.06.2019 16:00
The amount of potential energy possessed by an elevated object is equal to what?
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Physics, 22.06.2019 17:00
(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.
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A heavy boy and a light girl are balanced on a massless seesaw. If they both move forward so that th...
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