This video shows a middle school Khmer-American girl demonstrating algebra radical equation problem solving strategies.

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From http://www.physicsaccordingtopalladino.org Calculating the distance an object travels from rest given a velocity versus time graph.

What Is Gravity? Newtonian Gravity vs General Relativity What is gravity? It keeps you on the ground and the planets orbiting the sun. But do you really know what gravity is? If you haven’t heard of General Relativity, chances are you don’t know our current theory on what gravity is. Be sure to subscribe!