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.
(Within the FÃ©dÃ©ration Cynologique Internationale, the Russell terrier is also known as Jack Russell terrier.) The term Jack Russell is also commonly misapplied to other small white terriers. The Jack Russell is a broad type, with a size range of 10â15 inches (25â38 cm). The Parson Russell is limited only to a middle range with a standard size of 12â14 inches (30â36 cm), while the Russell terrier is smaller at 8â12 inches (20â30 cm). Each breed has different physical proportions according to the standards of their breed clubs.