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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.

"http://yt.cl.nr/_mCC-68LyZM" If you drop a heavy object and a light object simultaneously, which one will reach the ground first? A lot of people will say the heavy object, but what about those who know both will land at the same time? What do they think? Some believe both objects have the same gravitational pull on them and/or both fall to the ground with the same constant speed. Neither of these things is true, however. The force is greater on the heavy object and both objects accelerate at the same rate as they approach the earth, i.e. they both speed up but at the same rate.

The following animations represent molecular-level models of three classifications of pure substance based on the chemical bonding involved - metallic (e.g. solid copper), ionic (e.g. solid sodium chloride), and intermolecular (e.g. liquid water, liquid oxygen). Animations comparing substances in different states, and undergoing changes of state, are also listed so that the differences in intraparticle and and interparticle bonding can be discussed. This topic is known for the student misconceptions and confusion it can cause without careful visualisation. Temperature is correlated with the degree of particle movement.

"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.

An army of 1,001 volunteers set a new Guinness world record when they successfully created the largest ever human mattress domino rally. 

How fast electrons move in a closed circuit?Please compare it with the speed of light.?

How fast does electricity flow?