# Physics

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## Dimensional Analysis: A Powerful Tool for Physics and the MCAT Physical Sciences Exam

In physics, dimensional analysis is a powerful tool for checking relationships between physical quantities. The foundation of the technique is consideration of the dimensions of physical quantities. What exactly do I mean by dimensions? Here the word does not mean the same thing as it does in Euclidean geometry. As a simple example lets consider

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## Free-Fall Motion (Mapped Solution)

There are many techniques to use to solve physics problems. One of my favorites is drawing flow-chart-like diagrams showing paths to solutions.  The resulting “maps” are great visual summaries of the mental thought processes that went into solving the problems. Below is an example. At first glance it may seem overwhelming and confusing. Take some

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## Projectile Motion (Video)

In this guided practice, I work through a projectile motion problem involving the level horizontal flight of a water balloon. I end up deriving an expression relating the range, launch angle, and initial speed of a projectile undergoing level horizontal flight. Level horizontal flight is the situation where a projectile takes off and lands at