Magnitude of the force of repulsion
Two small spheres spaced 40.0 cm apart have an equal charge. How many excess electrongs must be present on each sphere if the magnitude of the force of repulsion between them is 5.37x 10^-21 newtons?
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Megan's mass is 26 kg. She starts from rest at the top of a 4.8 m tall slide and reaches a velocity of 5.1 m/s at the bottom of the slide. What is the change in thermal energy of the Megan/earth/slide system?
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A peg is located a distance h directly below the point of attachment of the cord. If h = 0.70 L, what will be the speed of the ball when it reaches the top of its circular path about the peg? (Use the following as necessary: g and L.)
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