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  2. Forensic firearm examination - Wikipedia

    en.wikipedia.org/wiki/Forensic_firearm_examination

    [36]: 32 The three main class characteristics of all bullets are the lands and grooves, the caliber of the bullet, and the rifling twist. [37] All three can be tied directly to the type of barrel that was used to fire the bullet. [37] The lands and grooves of barrel are the bumps and valleys created when the rifling is created. The caliber is ...

  3. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet was founded in 2005 by Andrew Sutherland as a studying tool to aid in memorization for his French class, which he claimed to have "aced". [ 6 ] [ 7 ] [ 8 ] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [ 9 ]

  4. Characteristic class - Wikipedia

    en.wikipedia.org/wiki/Characteristic_class

    Characteristic classes are elements of cohomology groups; [1] one can obtain integers from characteristic classes, called characteristic numbers. Some important examples of characteristic numbers are Stiefel–Whitney numbers , Chern numbers , Pontryagin numbers , and the Euler characteristic .

  5. Category:Characteristic classes - Wikipedia

    en.wikipedia.org/wiki/Category:Characteristic...

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  6. Exam - Wikipedia

    en.wikipedia.org/wiki/Exam

    This is an accepted version of this page This is the latest accepted revision, reviewed on 13 January 2025. Educational assessment For other uses, see Exam (disambiguation) and Examination (disambiguation). Cambodian students taking an exam in order to apply for the Don Bosco Technical School of Sihanoukville in 2008 American students in a computer fundamentals class taking an online test in ...

  7. Chern class - Wikipedia

    en.wikipedia.org/wiki/Chern_class

    One can define a Chern class in terms of an Euler class. This is the approach in the book by Milnor and Stasheff, and emphasizes the role of an orientation of a vector bundle . The basic observation is that a complex vector bundle comes with a canonical orientation, ultimately because GL n ⁡ ( C ) {\displaystyle \operatorname {GL} _{n ...

  8. Scientific evidence - Wikipedia

    en.wikipedia.org/wiki/Scientific_evidence

    Such evidence is expected to be empirical evidence and interpretable in accordance with the scientific method. Standards for scientific evidence vary according to the field of inquiry, but the strength of scientific evidence is generally based on the results of statistical analysis and the strength of scientific controls. [citation needed]

  9. Transient evidence - Wikipedia

    en.wikipedia.org/wiki/Transient_evidence

    Transient evidence is term used in criminal forensics to indicate elements of physical evidence that might be expected to degrade or disappear within a particular time frame. [1] As such, it is one of the five primary categories of physical evidence codified in Legal Medicine by the American College of Legal Medicine, along with conditional ...