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.
They are loyal family members who require continued socialization throughout their lives due to their reservednature towards strangers. Weighing in at 16 to 22 pounds, they are a comfortable size for most households and require a minimum amount of daily exercise. They are an active breed and like most terriers, love to dig. A secure backyard where the breed can get regular exercise is strongly recommended.