the wave travels. Surface waves: a wave that travels along a surface separating two media Longitudinal waves: a wave tin which the vibration of the medium is parallel to the direction to wave travels Sound waves: longitudinal waves Diffraction: the bending of a wave as it moves around an obstacle or passes through a narrow opening Refraction: the bending of a wave as it enters a new medium at an angle.
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by gathering all needed materials. Next‚ laying the first powder on four wells‚ followed by the next powders‚ each powder was placed on four wells. The liquids were then placed on each powder using the four droppers. Three drops of each liquids were placed on each powder. After observing the chemical reactions‚ and recording data the powders were then identified. Relating back to the research‚ and viewing each chemical reaction‚ the powders were identified.
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History Alexander Gurwitsch around 1930 Around 1923 Alexander Gurwitsch discovers an "ultraweak" photon emission from living systems (onions‚ yeast‚...)‚ since he suggested connections between photon emission and cell division rate. He calls this photonemission "mitogenetic radiation". His experiments indicate that the wavelength is in the range around 260 nm (Bibliography under Gurwisch and also Ruth (1977‚ 1979)). Around 1950: Russian scientists rediscover "ultraweak photon emission"
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Electromagnetic Spectrum 299‚792‚458 m/s – speed of light 186‚282 mile/s Speed of light = WL x Frequency C=(^)(v) Wavelength sa Electric field Band Designations: ELF- extreme low – 3-30hz SLF- super – 30-300hz ULF- ultra – 300hz-3khz VLF – very – (Vice Versa) LF – low MF – medium HF – VHF – UHF – SHF – EHF – 30-300ghz Standard Frequency JJY- japan – 40khz‚ 60khz MSF – Rugby‚England – 60khz‚5km‚3.1miles) WWVB‚ Colorado‚USA (60khz) HBG – Switzerland (75khz) DCF77 – main‚Germany (77.5khz) LORAN-
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LuYu Chen (Jessica) Ms. Cohen VA 402-1 Sep 26th 2014 Biography of Isaac Newton Isaac Newton was born on January 4th 1643 in Woolsthorpe‚ England. He was an outstanding physicist and mathematician and was credited as one of the great minds of the 17th century Scientific Revolution. Newton had accomplished on several subjects‚ such as: Math‚ Physics‚ Astronomy and so on. He was died in London on March 31th 1727. He lived for 85 years. Isaac Newton was the only son of
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alimahyar@hotmail.com Received 9 August 2010; revised and accepted 15 November 2010 SiO2-TiO2 mixed oxides have been prepared by sol-gel technique from titanium tetraisopropoxide and tetraethylorthosilicate. The prepared materials were characterized by X-ray diffraction‚ FT-IR spectroscopy‚ scanning electron microscopy‚ nitrogen physisorption and UV-vis diffuse reflectance spectroscopy. The results indicate that compared to pure TiO2‚ the SiO2-TiO2 mixed oxides show higher thermal stability‚ larger surface area
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The discovery of DNA: DNA was discovered in 1864 by Fredrick Miescher‚ but the main roles of DNA weren’t shown until 1943. Even though it was discovered way earlier‚ James Watson and Francis Crick did not find out the structure of the DNA until 1953. It was Called “Double Helix”. The Double Helix had two strands that would wind around each other as if it were a ladder. James Watson later wrote a book called‚ “The Double Helix: A personal account of the Discovery of the Structure of DNA”‚ which was
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Project Report - Determination of the Dosage of Bleaching Powder Required for Sterilization of Different Samples of Water CONTENTS 1. INTRODUCTION 2. GENERAL METHODS USED 3. THEORY 4. REQUIREMENTS 5. PROCEDURE 6. OBSERVATION TABLES 7. CALCULATIONS 8. RESULT 9. CONCLUSION INTRODUCTION Water is the major constituent of all living beings. Water necessary to sustain all types of life. The water used for drinking purpose by human beings should full the following
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1. What is rf technology? A. The technology in which the parameters such as amplitude‚ phase and frequency of radio frequency waves are changed so as to transmit and receive the information is known as RF technology or radio frequency technology. In this‚ the electromagnetic waves that lie in the range of 3 khz to 300 Ghz are used for the wireless communication between the two devices. The signal is modulated at the transmitter end and then the antenna converts this electrical signal into the radio
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the work of their contemporary DNA researchers. 1951 Rosalind Franklin x-ray crystallography of the DNA molecule without her know- ledge‚ for instance‚ was a vital step toward discovery. She began to capture pictures of DNA using x-ray diffraction. She also pre- sented her findings in a talk and suggested that the phosphate groups were on the outside of the molecule. 1953 James Watson and Francis Crick deliv- ered the structure of a double helix DNA molecule. They succeeded in connec-
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