9. A liquid is flowing through a horizontal pipe whose radius is 2.22 x10-2 m. The pipe bends straight upward through a height of 9.8 m and joins another horizontal pipe whose radius is 3.82 ×10-2 m. What is the speed of the liquid in the lower horizontal pipe if the pressure in both horizontal pipes is the same?

3. What is the laminar flow rate of water in a pipe with an internal radius of r and a length of L m if the pressure difference across the pipe is 2.0 kPa? The water in the pipe has a viscosity of approximately 0.6 mPa-s.    let r =2.5 cm let L=0.5m Describe the effect on the flow rate given each of the following changes. Each change is to the original system and all other variables are held constant.  The radius decreases The pipe length decreases  The fluid viscosity decreases  The pressure difference decreases

5. You are designing a diving bell to withstand the pressure of seawater at a depth of 250 m. a. What is the gauge pressure at that depth? b. What is the net force due to the water outside and the air inside the bell on a circular glass window 30.0 cm in diameter if there is 1.00 atm of pressure inside the bell.

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