What is an Arc ? | Arc in Circuit Breaker Before going through details of arc quenching or arc extinction technologies employed in circuit breaker we should know first what is arc actually. What is an Arc ?
Meet the World's Tallest and Shortest Dogs! Gibson and Boo Boo. These are the extremes: the world's tallest dog Gibson (7 ft / 2.1 m tall when standing on his hind legs) has met Boo Boo (4 in / 10 cm high) the world's smallest dog in Sacramento, California for Guinness World Records Day 2007.
From year to year, the tallest living dog is typically a Great Dane. Previous record holders include Gibson, Titan, and George; however, the current record holder is a black Great Dane named Zeus who stood 112 cm (44 in) at the shoulder before his death in September 2014.