Two pipes are smoothly connected together without leaks. One has a diameter of 3 cm and the other has a diameter of 5 cm. Water flows through the pipes. In which pipe is the flow speed the greatest?
1.in the pipe that the water flows through first (the "upstream" pipe)
2.in the 3 cm pipe
3.in the 5 cm pipe
4.in neither, the flow rate is the same in both pipes
2
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