CHEM 2303: ANALYTICAL CHEMISTRY II LECTURE 1 – INTRODUCTION‚ SAMPLE PREPARATION AND SPECTROPHOTOMETRY WHY STUDY ANALYTICAL CHEMISTRY? To gain a knowledge of the methods and strategies that have been developed to investigate the nature of the chemistry around and within us. To answer the age old questions: What is it? What is it made of? How does it work? We must learn the principles of chemical analysis and the array of strategies that have been developed to analyze chemistry. HOW DO WE ANALYZE
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Mass Spectroscopy Mass spectroscopy is a method used in science and industry in order to obtain the masses and relative concentrations of atoms and molecules and to detect isotopes in a sample based on their masses. In order to do this the method requires an instrument called the ‘mass spectrometer’‚ of which‚ is able extract accurate information of the relative masses of isotopes and their relative abundance. This makes the mass spectrometer very useful for applications such as carbon dating
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among other things. By looking at the shape of the spectrum of light emitted by a star‚ we can tell something about its average surface temperature. i) If we observe a star’s spectrum and find that the peak power occurs at the border between red and infrared light‚ what is the approximate surface temperature of the star? (in degrees C) The temperature will be ~4000K which would be about 3276 degrees Celcius. ii) If we observe a stars spectrum and find that the peak power occurs at the border between
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Then some of the energy is radiated back into space‚ by the Earth‚ in the form of infrared waves. However during this process‚ some of the outgoing infrared radiation is trapped by the Earth’s atmosphere and warms it; which in return keeps the temperature at a livable and somewhat constant level. However‚ the atmospheric layer is now being thickened by the harmful pollution and because of that more of the infrared waves are being trapped and are now warming more worldwide. Throughout the documentary
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YHCX5070 Vacuum Sweeper Truck adopts pure suction airflow dry type operations‚ and it is especially developed for urban roads conditions. This model sweeping width is 2.4m to 2.8m‚ with 5 m3 waste hopper‚ auxiliary suction pipe(6-10m). YHCX5070 Vacuum Sweeper Truck adopts pure suction airflow dry type operations‚ and it is especially developed for urban roads conditions. This model sweeping width is 2.4m to 2.8m‚ with 5 m3 waste hopper‚ auxiliary suction pipe(6-10m) and high efficient spray dust
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2.9 Erbium Doped Fiber Laser The EDFLs can operate in several wave-length regions‚ ranging from visible to far infrared. The 1.55 region has attracted the most attention because it coincides with the low-loss region of silica fibers used for optical-communications [14]. The erbium absorption line that best matches with available high power pump diodes is in the 980 regime. At this wave-length‚ the absorption cross section of erbium is so low that an excessive amount of fiber would be required for
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0 PANJAB UNIVERSITY CHANDIGARH- 160 014 (INDIA) (Estted. under the Panjab University Act VII of 1947-enacted by the Govt. of India) FACULTY OF SCIENCE SYLLABI FOR M.Sc. (TWO YEAR COURSE ) IN CHEMISTRY 1st & 2nd YEAR( Semester System) EXAMINATIONS 2013-2014 --:O:-- 1 OUTLINES OF TESTS‚ SYLLABI AND COURSES OF READING FOR M.Sc. FIRST YEAR (SEMESTER-I) EXAMINATION OF 2013 OBJECTIVE OF THE COURSE To teach the fundamental concepts of Chemistry and their applications. The syllabus pertaining
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Greenhouse Effect When one starts a car or burns wood‚ the last thought on their mind is the consequences to these actions. Unfortunately‚ the daily dangers to earth are not widely know. Due to the constant change of society‚ this planet must cope with various problems. One of the most important ecological structures is the ozone layer. The same shield that protects us from the sun ’s deadly radiation‚ can also act as a blanket engulfing us in heat. This situation is know as the greenhouse effect
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went above the red spectrum‚ a color not visible to the human eye‚ that the temperature increased. This led to the discovery of infrared light. (“History of infrared”‚ n.d.‚ para 1) 1801 – Jumping on the coat tails of Herschell’s groundbreaking discoveries‚ a year later Johann Wilhelm Ritter‚ a polish born physicist‚ hypothesized that light might exist past the infrared spectrum. Ritter discovered that if he used silver chloride‚ and the same glass prism‚ that an intense reaction would occur in
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FINAL PROJECT UNMANNED AERIAL VEHICLE (UAV) OPTICAL SYSTEM by (FIT) Melbourne‚ Florida USA IDN: EOTT-05 30 April 2013 Rev: 2.0 Team Eye of the Tiger Prepared By: Signature on File at Factory A. Mark Systems Engineer Approved By: Signature on File at Factory Signature on File at Factory J. Ignacio W. Overturf Systems Engineer Systems Engineer Signature on File at Factory Signature on File at Factory A. Elharti M. Grove Systems
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