Projectile is launched vertically from the earth
If a projectile is launched vertically from the Earth with a speed equal to the escape speed, how far from the Earth's center is it when its speed is 1/7 of the escape speed?
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A 3.50-inch floppy disk in a computer rotates with a period of 1.96E-1 s. What is the angular speed of the disk? What is the linear speed of a point on the rim of the disk?
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The alpha particle is 0.1 m away from a gold nucleus, which has charge +79e. Which statement about the electric forces between the particles is correct?
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