Standing waves are a common phenomenon usually shown through the vibrations of bridges or springs. Horizontal standing waves are produced in a lab by students shaking cords, springs and bungee cords. However, standing waves can also be produced in a vertical fashion by a single student. Using the new nylon Spring Wave, students are able to produce vertical standing waves easily and calculate the speed of the spring. This is a great little "twist" on the age-old standing wave lab that you have in your arsenal.
Did you know the yellow you see on your smart phone doesn't actually contain the color yellow? It's true! Watch this revealing video to see this - AND 9 more great demos that show there's more to studying light and color than meets the eye.
This online book uses a series of tutorials based on interactive simulations and animations to explore the physics of waves. Students develop their understanding of waves through guided questions and exercises based on these simulations.
Blue Physics by David Derbes is a free textbook (PDF), released under a Creative Commons license.
It is intended to be a "teach yourself" text for adults, covering first year college physics. Knowledge of high school algebra is a prerequisite; calculus is taught as needed. No prior knowledge of physics is presumed.
The book has many historical notes and worked examples. Internal references are hyperlinked.
× Students work in a friendly competition to solve challenging questions created by their peers in the Physics Face-off activityThe Physics Face-off is an activity where students use Direct Measurement ...
In this clip from Mythbusters, the team demonstrates what happens when you fire a ball out of a cannon that is traveling the opposing way, but at the same velocity. If you think about it, it's pretty obvious. But however strong your logic (or even your mathematics and understanding of physics) is, it still doesn’t quite seem right when you see it through a high-speed camera. Next time, we want to see a bullet being fired from a rocket car.
In 1997, Brazilian football player Roberto Carlos set up for a 35 meter free kick with no direct line to the goal. Carlos’s shot sent the ball flying wide of the players, but just before going out of bounds it hooked to the left and soared into the net. How did he do it? Erez Garty describes the physics behind one of the most magnificent goals in the history of football.
Below are a series of simulated situations used to illustrate major ideas in physics. Next to each link I give you a few things to consider as you explore the environment that was recreated in the program.
Dolores Gende's insight:
Series of simulations that illustrate physics concepts.
Kip Thorne looks into the black hole he helped create and thinks, “Why, of course. That's what it would do.”
This particular black hole is a simulation of unprecedented accuracy. It appears to spin at nearly the speed of light, dragging bits of the universe along with it. (That's gravity for you; relativity is superweird.) In theory it was once a star, but instead of fading or exploding, it collapsed like a failed soufflé into a tiny point of inescapable singularity. A glowing ring orbiting the
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