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An electron moving parallel to the x axis has an initial speed of 3.70 x 106 m/s at the origin. Its speed is reduced to 1.40 x 105 m/s at the point x = 2.00 cm.
(a) Calculate the electric potential difference between the origin and that point.
(b) Which point is at higher potential?
(c) Which point does the electron have a higher potential energy?
(d) If instead a proton had been traveling at the origin with the same velocity as the electron, how fast would it be moving when it reaches the point x = 2.00 cm?
(e) Which point has a higher potential?
(f) Which point does the proton have a higher potential energy?
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Water at a gauge pressure of 3.0 atm at street level flows into an office building at the speed of 0.40 m/s by a pipe 5.0 cm in diameter. The pipe tapers down to 2.20 cm in diameter by the top floor, 15 m above, where the faucet has been left open. E..
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