in the presence of Fe3O4 nano particles to synthesize polyaniline/Poly(p-hydroxyaniline)/ Fe3O4 (PAN/PHAN/ Fe3O4) composites. The composites‚thus synthesized have been characterized by Fourier transfer infrared(FTIR) spectrophotometer and X-ray diffraction . The morphology of these composites was studied by scanning electron microscopy. (Received September 29‚ 2009; accepted October 23‚ 2009) Keywords: Conductivity ‚ polyaniline ‚poly(p-hydroxyaniline)‚ Fe3O4 ‚ nanocomposites . 1. Introduction
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CBSE XII | PHYSICS Sample Paper - 1 CBSE Board Class XII Physics Sample Paper - 1 Time: Three Hours Maximum Marks: 70 General Instructions (a) All questions are compulsory. (b) There are 29 questions in total. Questions 1 to 8 carry one mark each‚ questions 9 to 16 carry two marks each‚ questions 17 to 25 carry three marks each and questions 27 to 29 carry five marks each. (c) Question 26 is a value based question carrying four marks. (d) There is no overall choice. However‚ an internal choice
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EVALUATION Final Exam 40% Midterm Exam 25% Quizzes 15% Assignments 20% COUSE CONTENTS Newton’s Gravitation law‚ Kepler laws‚ Electrostatics‚ Magnetisms‚ Amperes law‚ Magnetic flux density B‚ Reflection and Refraction‚ Interference and Diffraction‚ Natural and Artificial Radioactivity‚ Heat and Conductivity‚ Pressure and Density‚ Thermodynamic Principles‚ Electricity and Magnetism‚ Semi Conductors‚ Transistors‚ Satellite Communication‚ Introduction to Meteorology. COURSE USAGE(IF ANY)
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pyrimidines include __________ & ____________. 6. Rosalind Franklin: http://www.accessexcellence.org/RC/AB/BC/Rosalind_Franklin.php http://www.dnai.org/timeline/index.html Watch Franklin’s X-ray diffraction pattern. What is X-ray crystallography (a.k.a. X-ray diffraction)? What did she discover about the shape of DNA? 7. Linus Pauling:
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THE SCOPE OF PHYSICS CHAPTER # 1 QUESTIONS shahali_81@yahoo.com QUESTIONS 1994 Q.1 Q.8 (a) (a) Name three Muslim scientists? (3) Fill in the blanks:(1) (viii) The dimension of any physical quantity can always be expressed as some combination of the fundamental quantities. 1995 Q.1 (c) What are the dimensions of angular velocity “ω”? Show that the equation √ is (3) (1) dimensionally correct‚ where “T” is the time period of a simple pendulum of length “ ” at the place where acceleration
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researchers at one of the French government’s laboratories‚ the Central State Chemistry Laboratories. Mering was using x-ray crystallography‚ sometimes called x-ray diffraction‚ to study amorphous solids. Amorphous solids have no regular crystalline structure‚ for example‚ coal is an amorphous solid. Franklin began using x-ray diffraction to study the atomic structure of coal. Franklin became an expert in x-ray crystallography techniques. This type of work required excellent mathematical skills‚ which
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Characteristics and Nature of Waves In physics‚ a wave is a disturbance that travels through space and time‚ usually accompanied by the transfer of energy. Waves travel and the wave motion transfers energy from one point to another‚ often with no permanent displacement of the particles of the medium—that is‚ with little or no associated mass transport. They consist‚ instead‚ of oscillations or vibrations around almost fixed locations. For example‚ a cork on rippling water will bob up and down
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A polarized model is inadequate in depicting the characteristics that contribute to a developing country’s administrative system. As a result‚ Riggs abandoned models that differentiated between agrarianism and industrialism. Rather‚ Riggs opted to create a more diverse‚ yet simplified model‚ namely‚ the “fused-prismatic-diffracted” model or what I have chosen to call a “prismatic” model. The formulation of the prismatic model was primarily based upon the extent to which a social administrative
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synthesized by biophysical method. Silver nanoparticles were characterized using UV-Visible absorption spectroscopy (Surface Plasmon absorption at 418-420 nm)‚ Energy Dispersive Spectroscopy (EDX)‚ Scanning Electron Microscopy (SEM) and X- ray diffraction (XRD). The cytotoxic effect of silver nanoparticles on acute myeloid leukemia cell line (THP – 1 cell line) was studied in vitro. The activity of chemotherapeutic drugs Cyclophosphamide and Busulfan was enhanced in presence of silver nanoparticles
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entertainment medium. Lasers also have many important applications in scientific research. Lasers are distinguished from other light sources by their coherence. Spatial coherence is typically expressed through the output being a narrow beam which is diffraction-limited‚ often a so-called "pencil beam." Laser beams can be focused to very tiny spots‚ achieving a very high irradiance‚ or they can be launched into beams of very low divergence in order to concentrate their power at a large distance. Temporal
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