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 ...

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 ...

A UK-based spy ring passed secrets to Russia for almost three years, threatening national-interest and putting 'many lives at ...

Three Bulgarian nationals were allegedly part of a group which carried out surveillance on opponents of the Russian state, ...

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