Lab
During class we completed a lab in which we used a pipette to drop one drop of a red fluid (fake blood) onto a sheet of paper from a certain height using a meter stick. Then measure that drop we made using millimeters. Below is the data we retrieved from this lab.
Height (cm) |
20cm
|
40cm
|
60cm
|
80cm
|
100cm
|
120cm
|
140cm
|
160cm
|
180cm
|
200cm
|
Dia-
|
13mm
|
16mm
|
16mm
|
18mm
|
15mm
|
18mm
|
19mm
|
17mm
|
19mm
|
20mm
|
Blood Found At Anna's Crime Scene
Below is a exact replica of the blood drops found at the actual crime scene. Our task was to measure the diameter of the blood drops and compare them to the data we retrieved, thereby identifying the height from which the blood droplet fell based on the size of the bloodstain.
Final Graph
The blood droplets found at Anna's crime scene were 14mm in diameter, therefore by using our data, we can see that the blood fell from a height of either 20cm-40cm. Now, seeing that 20cm had a droplet of 13mm diameter, and 40cm had a droplet of 16mm diameter, we can infer that the blood droplets from the crime scene came from an estimate height of 25cm. Below in the final graph the black line is the data I took, while the yellow highlighted line is the estimated measure of the blood droplets found at scene.