This means of interruption soon became inadequate and special devices called circuit breakers had to be developed. The basic problem has been to control and quench or extinguish the high power arc, ...
Compiled by the Official Charts Company, the UK's biggest independently-released albums of the week by an artist who has not yet reached the Top 40, based on sales of digital bundles, CDs, vinyl ...
Plants and fungi are vital to the future of food, clean air and medicine. We're fighting against biodiversity loss to save life on Earth.