You have an evacuated, iron spherical shell and want to know how thick the shell wall is. however, you cannot cut open the iron shell to measure the thickness of the wall. the ball just floats once completely submerged in water, and you measure the outer diameter to be 58.7 cm. if the density of iron is 7.87 g/cm3 , what is the thickness of the wall?
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The basketball coach tells his team to run sprints back and forth across the court, which is 30 m long. they start at the left end of the court, run back and forth 6 times, then end back at the left end of the court where they began. what distance did they run? what is their displacement?
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