How to Read a Caliper
In this interactive object, learners review how to read a caliper. They then test their skills with eight practice questions.
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In this learning object the student will learn how to measure a stain and calculate angles of impact. Determining the angle of impact for bloodstains takes advantage of the trigonometric functions (Sine function).
A mathematical relationship exists between the width and length of an elliptical bloodstain which allows for the calculation of the angle of the impact for the original spherical drop of blood.
Given well formed stains we can accurately measure the width and length by simply dividing the stain along it’s major and minor axis. The opposite halves would be generally equal to each other which aids in establishing the impact angle.
Excellent training tool!
Very well done.
Perhaps, though, some terminologyregarding the various parts of the caliper would be useful so students are versed in the nomenclature and can better respond to future suggestions by their instructor.
But it probably really isnt necessary.
Thanks for the great job!Posted by Carey Kalupson on 11/3/2008 12:00:00 AM Reply
How to raed a dial caliper.
The answers are not in the right sequence with the review questions.
You can put in the correct answer and when you check the answer it states the answer is wrong.
Not good for a student trying to learn!
Other wise graet training material and site.Posted by Thomas Maples on 9/25/2007 12:00:00 AM Reply