Case Notes - Blood Pattern Analysis FILL IN :)

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xvatpnveb9

Science

Description

For this assignment you will be performing the mathematical calculations needed to determine the angle of impact for blood droplets that formed during the blunt force trauma injury that occurred during the crime.

You will need a calculator for this assignment. The calculator function you need is sin-1, which is the same as arcsin. If you do not have a calculator with that function, you can use this website: http://www.rapidtables.com/calc/math/Arcsin_Calculator.htm (Links to an external site.)Links to an external site.

Below is the two papers with images with information of blood splatters.

Also below is the sheet/tables you will fill in with answers :)

Unformatted Attachment Preview

blinds couch stand TV Stand Ceiling Item A. d = 9 mm D = 9 mm Left side of wall Item B. d = 6 mm D = 16 mm Item D. d = 7 mm D = 24 mm Item C. d = 5 mm D = 10 mm Item G. d = 8 mm D = 15 mm Item E. Item F. d = 6 mm D = 12 mm d = 10 mm D = 15 mm Right side of wall Item 1. d = 6 mm D = 22 mm Item H. d = 8 mm D = 14 mm Item J. d = 12 mm D = 24 mm On [today's date] at [current time in military format (use converter if needed)], I received three photos of blood spatter from the crime scene that are annotated with the length (D) and width (d) measurements of the drops that were measured for the angle of impact calculation. Photo Ceiling Left side of wall Droplets to Examine 1 droplet - Item A 6 droplets - Items B, C, D, E, F, & G Right side of wall 3 droplets - Items H, I, & J The angle of impact is mathematically determined using the formula angle of impact = sin The width and length measurements of the drops, as well as the calculations, are in Table 1 below. You need to put the correct measurements in the correct box and then show the calculation process. For the two calculation columns, you must round to three decimal places. You are expected to round correctly - rounding errors will result in a loss of points on this assignment. The final angle measurement in the last column should be a whole number only (no decimals!). There are two examples in the table to help you. Your format must be correct to earn full points. Table 1. Convergence calculations for blood droplet Items A - J Item Width d (mm) Length D (mm) Calculation (d/D) Calculation [sin-1(d/D)] Angle (degrees ). 90 D 9 9 9/9 = 1.000 sin-1(1.000) B C D E 6 12 6/12 = 0.500 sin-1(0.500) 30 F G H 1 J From the data above, we can estimate the position of Richard's head relative to the wall where this spatter landed and confirm he was sitting on the couch where he died when he was attacked.
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Explanation & Answer

I don't know why the result in B keep getting mixed up. But I have resolved it now.Please see the attachment below for the solution:

Table 1. Convergence calculations for blood droplet Items A-J
Item

Width d
(mm)

Length D
(mm)

A
B
C
...


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