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Water is moving with a speed of 5m/s during a pipe with a cross-sectional area of 4 cm ^2. The water gradually descends 10mas the pipe cross-sectional area increases to 8cm^2. (a) What is the speed at the lower level? (b) If the pressure at the upper level is 1.5 x 10^5 Pa, what is the pressure at the lower level?

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