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Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
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Một vật được thả rơi tự do trong giây cuối cùng nó đi được 1/2 quãng đường vật rơi. Tính thời gian v...
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