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Secondary SchoolPhysics 13+7 pts
Molten metal can be poured into the pouring cup of a sand mold at a steady rate of 1000 cubic centimeter per second. the molten metal overflows the pouring cup and flows into the downsprue. the cross-section of the sprue is round, with a diameter at the top = 3.4 cm. if the sprue is 25 cm long, determine the proper diameter at its base so as to maintain the same volume flow rate.
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