Physics Commons^™

Heart Attack Physics, John Zwart

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I recently had a first-hand opportunity to learn some interesting biomedical applications of physics which provide application examples for introductory classes. While there were many such applications, from X-rays to ultrasonic imaging, I’ll focus on fluid flow through clogged coronary arteries and the use of radioactive materials in a nuclear stress test.

Physics 101: Observing Physical Creation, Kayt E. Frisch

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"Physics is fundamentally about repeatedly observing the Creation, building models that describe our observations, and then making predictions about what we will observe in the future."

Posting about the study of physics from In All Things - an online hub committed to the claim that the life, death, and resurrection of Jesus Christ has implications for the entire world.

http://inallthings.org/physics-101-observing-physical-creation/

Systematic Errors In Intro Lab Video Analysis, John Zwart, Kayt E. Frisch, Tim Martin

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In video analysis lab experiments, students frequently find large discrepancies between results based on self-filmed videos and expected values (e.g. for g determined by a fit to projectile motion data). These differences are frequently far larger than the uncertainty calculated from their fit. Using an inexpensive point-and-shoot camera with a 4x optical zoom to record video, we investigated two possible causes of this error: the effect of placing the reference meter stick at a different object-to-camera distance and the effect of the motion of interest being in a plane not perpendicular to the camera lens. When we observed these phenomena …