The hertz (symbol Hz) is the unit of frequency in the International System of Units (SI) and is defined as one cycle per second. It is named for Heinrich Rudolf Hertz, the first person to provide conclusive proof of the existence of electromagnetic waves.
This article is about a Hindu caste. For other uses, see Nair (disambiguation). The Nair /ËnÉË.jÉr/, also known as Nayar, are a group of Indian castes, described by anthropologist Kathleen Gough as not a unitary group but a named category of castes. The Nair include several castes and many subdivisions, not all of whom historically bore the name 'Nair'.
A salamander is an amphibian that has four legs, a long and slender body and a long tail. Despite their lizard-like appearance, salamanders are most closely related to the smaller amphibious lizard, the newt.Salamanders are found all over the world generally in more temperate climates.All species of salamander are aquatic or semi-aquatic due to their amphibious nature and permeable skin. The moist skin of the salamander means that the salamander inhabits aquatic regions or wetlands.alamanders are found all over the world generally in more temperate climates. All species of salamander are aquatic or semi-aquatic due to their amphibious nature and permeable skin. The moist skin of the salamander means that the salamander inhabits aquatic regions or wetlands.