Introduction: In this experiment we will determine how the difference in length and diameter of a blood vessel have an effect on the resistance of blood flow and how the viscosity of blood will also effect the resistance of blood flow in a blood vessel.
Observation: My mom is a big Elvis fan and she always wondered how his health affected his death. Knowing that he had high cholesterol and high blood pressure I decided to do an experiment on what factors may have had an effect on his high cholesterol and high blood pressure.
Hypothesis: I know that the longer the length of the tube, the smaller the diameter of the tube, and the thicker the viscosity of a substance the greater the resistance, therefore it will take longer for the substance to pass through it. Controlled Factors:
Independent: length, diameter, viscosity
Dependent: Amount of time for the fluid to pass
Experimental Design: Procedure A: Length
Using a short 40 cm tube attach it to a ring stand with a clamp.
Arrange and position the tube making sure that it is horizontal.
Put an empty beaker at the end of the tube to catch the substance that flows through the tube.
Fill a 100 ml graduated cylinder with water, adding a drop of food coloring to it. (Food coloring will make it easier to see the fluid as it flows through the tube)
Using a funnel, pour the 100 ml of water …show more content…
|7.85 secs |1.44 secs |
Average: 8.24 secs (3 mm) 1.29 secs (7 mm) Viscosity
|35 ml water |35 ml syrup |
|1.56 secs |49.00 secs |
|2.06 secs |36.09 secs |
|2.44 secs |37.03 secs |
Average: 2.02 secs (35 ml water) 40.71 secs (35 ml