Water is circulating through a closed pipe system in a two-floor apartment. On the first floor, the gauge pressure of the water is 9.7 x 10^4 and its speed is 2.1m/s. On the second floor, which is 4m higher, the speed of the water is 3.7m/s. The water speeds are different on the two floors, because the pipe diameters are different. When the water stops flowing, the gauge pressure of the water on the first flow becomes 1.1x10^5 Pa. What is the gauge pressure on the second floor?
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