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Physics, 27.08.2019 16:20, andreimru123123
Lthough human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the earth has proven much more difficult. the deepest mines ever drilled are only about 10 miles deep. to illustrate the difficulties associated with such drilling, consider the following: the density of steel is about 7900 kilograms per cubic meter, and its breaking stress, defined as the maximum stress the material can bear without deteriorating, is about 2.0ร109 pascals. what is the maximum length of a steel cable that can be lowered into a mine? assume that the magnitude of the acceleration due to gravity remains constant at 9.8 meters per second per second.
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Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.
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