PLCscience

How fast does electricity flow?

Impossible objects, like those drawn by artist M. C. Escher, don't seem like they could exist in the real world. But Kokichi Sugihara from Meiji University in Kawasaki, Japan, is well known for building 3D versions of these structures.

Create quizzes and collect instant visual feedback.

"http://yt.cl.nr/VSwfqaVeCWs" 850 people in New Orleans were knocked back onto mattresses in human dominoes to break the world record for the number of people taking part.

"http://yt.cl.nr/Jk5E-CrE1zg"

In the last physics lesson, the teacher seemed to have to explain the Doppler effect for quite a long time to some people before they understood it. So, being the nice, considerate, thoughtful person I am, I decided out of the goodness of my golden heart to explain the Doppler effect for future reference using animation (actually, I thought it would be a fun thing to do anyway). For those of you who are confused about what the Doppler effect has to do with anything, it's red shift and blue shift. So it is relevant to the lesson.

"http://yt.cl.nr/EMCB_7yb8GU" A video demonstrating the CHEM 1001 experiment on the determination of heats of solution by calorimetry.

A demonstration of Ernest Rutherford's gold foil experiment. Human beings represent alpha particles, a mattress represents gold foil.

The "Fukushima disaster" clouds the merits of nuclear power, argues Martin Freer. The dramatic events that unfolded at Japan's Fukushima Daiichi nuclear-power plant after last year's tsunami are commonly referred to as "the Fukushima disaster." We need look no further than this description to begin to understand the significant misconceptions that surround nuclear energy.

At position six on the periodic table, Carbon hits the goldilocks spot - not too big, not too small. And with four outer electrons dying to hook up it's perfectly primed for bonding with other elements and for use in nanotechnologies. Jonica Newby traces the path of carbon in nanotechnology and delves into the latest advances.

Joe Kittinger jumped from an altitude of 31,200m (102,800ft) setting several records, some of which remain unbroken.

"http://yt.cl.nr/8V2ncwumv9o" Col. Joseph Kittinger -1960 - set world records for highest parachuting jump (102,800 ft. or 20 miles, 31km), highest balloon jump and fastest speed (close to speed of sound) by a person through the atmosphere.

"http://yt.cl.nr/jzWraXa2qF0"

Egg geode experiment: growing crystals in egg shells

This Uni of Qld site explains how to evaluate the reliability, accuracy and validity of secondary sources.

Rubidium dropped in water!!!