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Physics, 21.06.2019 17:00, itzia00
Why is alternating current more effective at longโdistance 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.
Answers: 1
Physics, 22.06.2019 12:10, davidoj13
Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f
Answers: 2
Physics, 22.06.2019 13:30, adrian1742
In a series circuit the __ is the same at every point
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Physics, 22.06.2019 15:50, ksiandua07
An object with initial temperature 130 โ f is submerged in large tank of water whose temperature is 50 โ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = โ 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )
Answers: 1
To subtract displacements, a needs to be set...
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