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A 0.85kg ball attach to the end of a horizontal cord is rotated in a circle of a radius 1.9m on a friction less horizontal surface. If the cord will break when the tension in it excedes 93N, what is the max speed the ball can have?
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A clock is set against an accurate standard and 30 days later is found to be in error by 12 seconds. What is the percentage of error in its time keeping?
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