# Espn

## Espn

Project: Investigating the Flow of Water

Raymond Fackler
Period 2
2/19/09
Chapter 5 Project

Project: Investigating the Flow of Water

The goal of the experiment is to determine if the pressure and weight of the water at different heights will have an influence on the outcome of time it takes for water to pass through a hole in bottom of the can. I collected my materials, and then proceeded to punch a hole in can and fill it with water. I measured the amount of water in the can to give me a starting height. Then I covered the hole with my finger and released water at 10 second increments, re-measuring the water height in the can. After 140 seconds, the water, was virtually gone and had a hard time draining. I then collected my data, and organized it into charts, and plugged my numbers in to the quadratic function given. Below is all the data collected during this experiment. The only difficulty I had, was that I needed to find another person to help me either take the measurements or hold the can steady, it was also difficult to achieve exactly 10 seconds every time. It was difficult to get precise measurements because the water moves slightly when the can is held. Perhaps, a better way to do measurements would be to use a graduate cylinder and measure the water that is release at each 10 second increment. As well as having a ring stand to hold the jar so that it is not moving and the water is steady.

1. Table of Time vs. Height experimental/ Height Theoretical

Time (seconds) Height experimental (mm) Height Theoretical (mm)
0 106
10 94
20 81
30 73
40 64
50 50
60 45
70 31
80 26
90 20
100 16
110 13
120 9
130 7
140 4

4. D = 118mm
d = 3.5 mm
h0 = 106mm

5. h(t) = (( 106 – 70d2 / D2) (t)) 2 =
h(0) = (( 106 – 70(3.5)2 / 1182) (0)) 2 = 104.73 mm
h(10) = (( 106 – 70(3.5)2 / 1182) (10) 2 = 93.69 mm
h(20) = (( 106 – 70(3.5)2 / 1182) (20) 2= 82.15 mm
h(30) = (( 106 – 70(3.5)2 /...