Transistor radio

The transistor radio is a small radio receiver.RCA established a prototype transistor radio in 1952. The first profitable transistor radio, the Regency TR-1, was announced on October 18, 1954 by the Regency Division of Industrial Development Engineering Associates of Indianapolis, Indiana and put on sale in November of 1954. It cost $49.95 (the equivalent of $361 in year-2005 dollars) and sold approximately 100,000 units.

Abiotic pollination

It occurs when pollination is mediated without the participation of other organisms. For illustration, anemophily is pollination by wind. This form of pollination is very common in grasses, most conifers, and a lot of deciduous trees. Hydrophily is pollination by water and occurs in aquatic plants which let go their seeds directly into the surrounding water. About 80% of all plant pollination is biotic, of the 20% of abiotically pollinated species, 98% is by wind and 2% by water.

Ionosphere

It is the division of the atmosphere that is ionized by solar radiation. It plays a significant part in atmospheric electricity and forms the inner edge of the magnetosphere. It has sensible importance because, among other functions, it influences radio propagation to distant places on the Earth. It is situated in the thermosphere and is responsible for auroras.

Waka

In the Maori language, waka are Maori watercraft, usually canoes. Similar craft are encounter in Polynesia, with connected names such as vaka. Waka range is from small, lightweight canoes, such as waka tiwai used for fishing individuals, during very large waka taua, manned by up to eighty paddlers and up to fourty mtrs in length, large double-hulled canoes for oceanic voyaging.

Many waka are single-hulled vessels locate from hollowed tree trunks. Small waka consist of an only piece as large waka typically consist of some pieces jointed and lashed together. Some waka, mainly in the Chatham Islands, were not usual canoes but were constructed from raupo stalks. Ocean waka, Paddled could be in any size, but were usually propelled by sail. Waka taua are paddled to put across their mana.

Small efficient waka are commonly plain and simple. Superior canoes waka taua in testing are extremely carved. Waka taua are no longer used in fighting but frequently for official purposes.