A ring cooled in liquid nitrogen will jump higher than an identical ring that is at room temperature. Contrary to popular belief, this is not a demonstration of Lenz' law. The current induced in the ...

UK-based spy ring passed secrets to Russia and risked many lives, court told - Three Bulgarian nationals were allegedly part ...

Show that it is easy to put the ball through the ring. Light the blowtorch and heat the ball evenly, waving the flame over all parts of the ball. Turn off the blowtorch. Show that the ball no longer ...

Katrin Ivanova, 33, Vanya Gaberova, 30, and Tihomir Ivanchev, 39, also Bulgarian nationals, deny a charge of conspiracy to ...