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'.
Crocodiles (subfamily Crocodylinae) or true crocodiles are large aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia.Crocodylinae, all of whose members are considered true crocodiles, is classified as a biological subfamily.espite their large adult sizes, crocodiles start their lives at around 20 cm (7.9 in) long. The largest species of crocodile is the saltwater crocodile, found in eastern India, northern Australia, throughout South-east Asia, and in the surrounding waters.