Sirius Strike

As the magnet falls through this copper tube, there is a time rate change in magnetic flux perpendicular to the plane of the copper loop through which the magnet is passing. This causes an opposite induced EMF (faraday’s law). This causes a current to develop in the copper tube, which, in turn, causes a magnetic field to develop inside the tube, opposing the magnetic field of the magnet (Ampere’s Law and Biot-Savart Law). This causes the magnet to slow, which in turn causes a decrease in the time rate change of the magnetic field, causing a reduction in the induced current, and a reduction in the opposing induced magnetic field. Thus, an equilibrium is reached where the magnet is slowed in such a way that the weight is offset by the opposing magnetic field such that the magnet moves steadily downward.

Heres the link! go buy one! (or two and send me one, cause im poor, even though its only $20…)

Analysis professor

Calculus Professor

- Abstract algebra professor

Yellow Brick Road to Infinity

The construction of a hypotrochoid by rolling a circle within another circle.

Happy first day of summer!