A needle placed carefully on water, however, can be supported by the surface tension-the liquid responds in a way similar to a stretched membrane. Try it at home-see what you can get to float on water. One way to think of surface tension is in terms of energy. The larger the surface, the more energy there is.
The Airedale is the largest of the British terriers. They weigh 20â30 kilograms (44â66 lb) in fit condition and have a height at the withers of 58â61 centimetres (23â24 in) for males, with females slightly smaller. The American Kennel Club standard specifies a very slightly smaller dog.
American Bulldog is the biggest of them overall (up to 100 lbs or so). APBTs generally range from 35-65 lbs. AmStaffs lean toward the higher end of the APBT spectrum, and Staffordshire Bull Terriers lean toward the lower end. Presa Canarios and Dogo Argentinos aren't bully breeds, but they are a kind of mastiff.