photon hypothesis. The energy of a photon is associated with its frequency with the relation (1.1) Where h is the Planck constant. And to solve the paradox that electrons goes around the nuclear without electromagnetic radiation, Bohr put forward the atom model. In this theory the electrons have stationary orbits (1.2) Where is called the reduced mass. When the electrons transit from the high energy levels to the lower ones, the energy of the photons emitted is just the energy difference between
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Philippine Women's College of Davao University Avenue, Juna Subdivision, Matina Davao City Title: The effect of Varying temperature on the conductivity of water I. ABSTRACT Saltwater has a low voltage reading but it has still a purpose like lighting up a small bulb that can lighten up a house that has no electricity especially in rural places. This experiment can help many lives especially the places that electric company can't reach their places. All you need is a water that can be found
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Chemistry 105 Spring, 2013 Unit 2 Summary 4/25 Outcomes: 1. To review air quality issues related to fossil fuel consumption and the limitations of this resource. 2. To define energy, work, heat, and temperature in scientific (thermodynamic) terms, and how the terms calorie, nutritional Calorie, joule, and kilojoule are related. 3. To describe the First Law of Thermodynamics as the conservation of energy, and the interplay of kinetic, potential, heat and work energy. To describe and
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(groups of atoms) level. It is the collective term for a range of technologies, techniques and processes that involve the manipulation of matter at the smallest scale (from 1 to 100 nm). The classical laws of physics and chemistry do not readily apply at this very small scale for two reasons. Firstly, the electronic properties of very small particles can be very different from their larger cousins. Secondly, the ratio of surface area to volume becomes much higher, and since the surface atoms are generally
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using electrolysis By Grace Olivia Robinson What is electrolysis? Electrolysis is a process that uses electricity to break up elements and compounds. Using a negatively charged electrode called a cathode and a positively charged electrode called an anode an electric current is passed through a liquid solution containing ions, this separates the naturally occurring elements in the solution. Where is electrolysis used? Electrolysis is used in a variety of different industries for different
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AP Biology Summer Independent Study Packet Directions: As you carefully read through chapters 1-7 in your Campbell Biology textbook, thoughtfully respond to each of the following questions. It is important that you actually read the chapters for review and understanding. Do not just look for answers to the questions provided. Review all diagrams provided. The majority of the material in these beginning chapters should be a review for you. If need be, focus on those areas which may seem less familiar
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ABSTRACT This experiment will examine the concentrations of Zinc in several "samples." We will be using a Zinc lamp on the flame atomic absorption spectrophotometer. The lab assistant will demonstrate the software and the procedures for preparing the instrument. Each group will run a series of calibration standards to generate a calibration curves. The concentrations are given below. Then, one of the "unknown" samples (A or B) should be run. The printer will generate a report of the concentration
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to other cells. The major electrolytes that are in our body are as follows: sodium (Na+), potassium (K+), chloride (Cl-), calcium (Ca2+), magnesium (Mg2+), bicarbonate (HCO3-), phosphate (PO42-), sulfate (SO42-). Sodium is an abundant metallic element which is an important mineral for all living organisms. It is also widely used industrially to make an assortment of consumer goods. In a pure form, sodium is a soft, silvery gray, highly reactive metal. Pure sodium is usually stored in a nonreactive
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and nucleic acids (DNA and RNA). These compounds in turn consist of elements such as carbon, hydrogen, oxygen, nitrogen, phosphorus, calcium, iron, zinc, magnesium, manganese, and so on. All of these chemical compounds and elements occur in various forms and combinations (e.g. hormones, vitamins, phospholipids, hydroxyapatite), both in the human body and in the plant and animal organisms that humans eat. The human body consists of elements and compounds ingested, digested, absorbed, and circulated through
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05 -071 Page 1 of 24 Chapter 132 - Science and Technology Section SCIENCE AND TECHNOLOGY Science and technology provide people with the knowledge and tools to understand and address many of the challenges. Students must be provided with opportunities to access, understand, and evaluate current information and tools related to science and technology if they are to be ready to live in a 21st century global society. The study of science and technology includes both processes and bodies
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