NUCLEAR ENERGY Nuclear energy is the energy contained in the centre ‚ or nucleus of an atom. The nucleus is the most powerful source of energy that exist. Nuclear energy is use in scientific research and in medicine treatments. It powers satellites and submarines‚ and it is used to produce electricity. People have also put nuclear energy to destructive uses through the creation of weapons.1 Nuclear energy also called ATOMIC ENERGY‚ energy
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C2.1.1 Structure and bonding a) Compounds are substances in which atoms of two or more elements are chemically combined. b) Chemical bonding involves either transferring or sharing electrons in the highest occupied energy levels (shells) of atoms in order to achieve the electronic structure of a noble gas. c) When atoms form chemical bonds by transferring electrons‚ they form ions. Atoms that lose electrons become positively charged ions. Atoms that gain electrons become negatively charged
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the information of Amina Khan‚ "Roads could become safer by making cars look smaller‚ thereby reducing blind spots"‚ the usage of this cloak is not intended to completely mask the object‚ rather to distort the lights and making the observer see an isotope of the original or a completely new image.
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Year 11 Module 1 – The Chemical Earth The Earth is made up of a large number of different substances: elements‚ compounds & mixtures We can classify elements & compounds as pure substances. These are always HOMOGENEOUS. Mixtures are not pure substances and can be either homogeneous or HETEROGENEOUS. Pure substances have a fixed composition eg copper metal‚ sulfur‚ carbon dioxide (CO2)‚ methane (CH4). Mixtures have variable composition and can also be separated into its components relatively
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Some terms • Geographical informations system (GIS): Included digital elevation‚ streets‚ land use and cover‚ topographic map‚ hydrology‚ aerial photographs. Software app that brings spatial data together for consolidation. • Horizontal excavation: an excavation for which the goal is to excavate a broad area in order to expose the remains of a single point in time. • Vertical excavation: an excavation for which the goal is to excavate a significant depth of deposits to expose the record of a sequence
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Diffusion is one of several transport phenomena that occur in nature. A distinguishing feature of diffusion is that it results in mixing or mass transport without requiring bulk motion. Thus‚ diffusion should not be confused with convection or advection‚ which are other transport mechanisms that use bulk motion to move particles from one place to another. In Latin‚ "diffundere" means "to spread out". There are two ways to introduce the notion of diffusion: either a phenomenological approach starting
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Chapter 4 Applications of First-order Differential Equations to Real World Systems 4.1 Cooling/Warming Law 4.2 Population Growth and Decay 4.3 Radio-Active Decay and Carbon Dating 4.4 Mixture of Two Salt Solutions 4.5 Series Circuits 4.6 Survivability with AIDS 4.7 Draining a tank 4.8 Economics and Finance 4.9 Mathematics Police Women 4.10 Drug Distribution in Human Body 4.11 A Pursuit Problem 4.12 Harvesting of Renewable Natural Resources 4.13 Exercises In Section 1.4 we have seen that
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Rubidium is a chemical element that was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff‚ in Heidelberg‚ Germany through a scientific process of flame spectroscopy. During the process‚ Kirchhoff and Heidelberg noticed bright red lines in its emission spectrum which caused them to choose the name Rubidium derived from the Latin word rubidus‚ meaning "deep red". Rubidium is a chemical element with symbol Rb and atomic number 37 and an atomic mass of 85.4678. Rubidium is a soft‚ silvery-white
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http://www.kewpid.com 1. Fossil fuels provide both energy and raw materials such as ethylene‚ for the production of other substances 1) Construct word and balanced chemical equations of chemical reactions as they are encountered • Methane + oxygen carbon dioxide + water • CH4(g) + 2O2(g) CO2(g) + 2H2O(l) 2) Identify the industrial source of ethylene from the cracking of some of the fractions from refining of petroleum Generally‚ demand for petrol exceeds supply produced from fractional distillation
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INTRODUCTION Radioactive emissions are electromagnetic radiations which occur due to the spontaneous disintegration of unstable nuclei. Natural elements with atomic number greater than 83 and isotopes of some lighter elements are found to be radioactive. They are categorized as alpha‚ beta and gamma radiations. Alpha particles are positively charged helium-4 nuclei ‚ beta particles are high energy-high speed electrons while gamma rays unlike alpha and beta radiation have no mass and charge and
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