Surface tension is a phenomenon in which the surface of a liquid, where the liquid is in contact with gas, acts like a thin elastic sheet. This term is typically used only when the liquid surface is in contact with gas (such as the air). Causes of Surface Tension.
There are several varieties commonly available, including White Vienna, Purple Vienna, Grand Duke, Gigante (also known as Superschmelz), Purple Danube, and White Danube. Coloration of the purple types is superficial: the edible parts are all pale yellow. The leafy greens can also be eaten.ohlrabi (German turnip or turnip cabbage; Brassica oleracea Gongylodes Group) is an annual vegetable, and is a low, stout cultivar of cabbage. Kohlrabi can be eaten raw as well as cooked.
The also grow in some forested areas in Europe and Asia. Edible parts: Trout Lily is both medicinal and edible. The leaves have a very mild flavour and the flowers have a slight sweetness due to their nectar and are also slightly acrid. The corms are edible as well and have a cucumber-like taste. Trout lilies are an emetic (makes you throw up), therefore it is recommended not to eat mass quantities of these in one day. You can add this plant to a salad or eat them as a trail snack. You can also make a tea with the flower, leaves or corm (or all).