Chapter 6 Fluids and Motion 1. About how fast can a small fish swim before experiencing turbulent flow around its body?

Chapter 6 Fluids and Motion
1. About how fast can a small fish swim before experiencing turbulent flow around its body?
2. How much higher must your blood pressure get to compensate for 5% narrowing in your blood vessels? (The pressure difference across your blood vessels is essentially equal to your blood pressure.)
3. If someone replaced the water in your home plumbing with olive oil, how much longer would it take you to fill a bathtub?
4. You are trying to paddle a canoe silently across a still lake and know that turbulence makes noise. How quickly can the canoe and the paddle travel through water without causing turbulence?
5. The pipes leading to the showers in your locker room are old and inadequate. Although the city water pressure is 700,000 Pa, the pressure in the locker room when one shower is on is only 600,000 Pa. Use volume=(π* pressure different* pipe diameter^4)/ (128* pipe length*fluid viscosity)] to calculate the approximate pressure if three showers are on.
6. If the plumbing in your dorm carried honey instead of water filling a cup to brush your teeth could take awhile. If the faucet takes 5 s to fill a cup with water, how long will it take to fill your cup with honey, assuming all the pressures and pipes remain uncharged?
7. How quickly would you have to move a 1-cm-diameter stick through olive to reach a Reynolds number of 2000, so that you would begin to see turbulence around the stick? (Olive oil has a density of 918 kg/m^3)
8. The effective obstacle length of a blimp is its width- the distance to which the air is separated as it flows around the blimp. How slowly would a 15-m-wild blimp have to move to keep the airflow around it laminar? (Air has a density of 1.25kg/m^3)