wyszukanych pozycji: 2
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Dental Caries and Periodontal Health in Kenyan Adolescents
ISBN: 9783659236822 / Angielski / Miękka / 2012 / 84 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. The state of oral health in Kenya continues to generate a lot of interest considering that there has been no national oral health survey for the entire nation.There is therefore need to provide some baseline data on oral health conditions in Kenya to help in planning for a national oral health survey. This book presents the findings of a study on the status of Dental Caries and Periodontal Health among adolescents in Western Kenya.
The state of oral health in Kenya continues to generate a lot of interest considering that there has been no national oral health survey for the entir...
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cena:
253,29 zł |
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A Proto-type Solar Air Thermal Collector
ISBN: 9783659715952 / Angielski / Miękka / 2015 / 64 str. Termin realizacji zamówienia: ok. 13-18 dni roboczych. The sun produces light with a distribution similar to what would be expected from a 5525 K (5250 °C) black-body, which is approximately the suns surface temperature. Radiation interacts with matter in several ways: Absorption, Transmission, Scattering, Reflection. When a photon is absorbed, its energy is changed into a different form: electrical or heat. A fraction of the incoming solar radiation is reflected back into space - this is known as the albedo. Direct normal solar radiation is the part of sunlight that comes directly from the sun. This would exclude diffuse radiation, such as that...
The sun produces light with a distribution similar to what would be expected from a 5525 K (5250 °C) black-body, which is approximately the suns surf...
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cena:
206,24 zł |