Simulates water in a ripple tank. Demonstrates basic wave mechanics: wave reflection, diffraction, and superimposition. Press "P" to pause the simulation and "R" to reset it. Left-click to add a drop ...

Explore a wide range of recent research in mathematics. From mathematical modeling to why some people have difficulty learning math, read all the math-related news here.

The "moving wall" represents the time period between the last issue available in JSTOR and the most recently published issue of a journal. Moving walls are generally represented in years. In ...

Modal verbs are verbs that indicate likelihood, ability, permission or obligation.

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