1. What is the purpose of science? The purpose of science is to understand. With science‚ we ask questions‚ seek answers‚ and prove or disprove our theories and speculations. According to the text on page 10 “Science is a way of knowing about the natural world.” (Citations will be provided at the end of the worksheet‚ rather than a continuous re-pasting each time.) 2. Define organism. Give an example of a unicellular organism. According to the text on page 3‚ “Organisms‚ such as trees and humans
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Microscopes were invented in the 1600s. Robert Hooke first looked at a thin slice of cork in 1665; he saw "a lot of little boxes." These little boxes first reminded of the little rooms monks lived in‚ so he called them cells. Hooke observed the same pattern in the stems and roots of carrots and other plants. What Hooke still did not know‚ however‚ was that cells are the basic units of living things. Ten years later‚ the Dutch scientist Anton van Leeuwenhoek focused a microscope on what seemed to
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absolute photopeak efficiency absolute preconcentration in trace analysis absorbance‚ quantity absorbance matching in spectrochemical analysis absorbed dose of a substance absorbed dose‚ of radiation absorbed electron coefficient in in situ microanalysis absorbed electrons in in situ microanalysis absorbed (spectral) photon flux densityquantity absorbed (spectral) radiant power densityquantity absorber absorptance‚ quantity absorption absorption coefficient absorption coefficient
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ignition system. A.) Permanent magnets‚ High tension coil‚ Mechanical or electronic switching device‚ Condenser‚ High tension spark plug wire‚ Spark plug 4.) Regarding atoms _______. A.) C 5.) The electron theory states that ________. A.) B 6.) Substances that have electrons that can move freely from atom to atom are said to be good ___________. A.) A 7.) List three good electrical current conductors. A.) Cooper‚ aluminum and silver 8.) List three good insulating
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could have created it. Though people have found that it was probably created in the early 20th century. The Science behind the Jacob’s Ladder is pretty simple. When you turn it the transformer creates an electrical current which is made up of electrons. After you turn it on the electrical current flows onto one of the wires‚ but
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types of radiation with matter 1.Atomic Spectroscopy 2.Molecular spectroscopy • Important to understand the interaction between the electromagnetic radiation and the matter (mainly)‚ + interaction of a acoustic waves and beam of particles (ions‚ electrons) with matter. • Wave model failed to account for absorption and emission of EM energy – (sinosoidal wave model (λ ‚ f‚ v‚ Amplitude) • Particle model : EM radiation is viewed as stream of discrete particles or wave packets‚ of energy called
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Determination of Melting and Boiling Point of different Organic Compounds Bakare‚ Abimbola Kristine‚ C. Professor Miranda Marilyn‚ school of chemical engineering and biotechnology‚ Mapua Institute of Technology‚ CHM145L-B11 ABSTRACT A melting point of a solid is the temperature at which the first crystal just starts to melt until the temperature at which the last crystal just disappears. Thus‚ the melting point (m.p.) is actually a melting range. The melting point of a substance depends
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Date: 2013/03/29 1. If we apply the highly successful kinetic theory of gases to a metal‚ consider as a gas of electrons (in fact‚ back in 1900 Drude constructed the theory‚ hence the Drude theory of metals)‚ and assume that the electron velocity distribution is given by the Maxwell-Boltzmann distribution‚ what would the most probable speed‚ average speed‚ and rms speed for electrons at room temperature? Compare those to H2. The Drude theory was replaced by the Sommerfeld theory of metals‚ in
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By the strange laws of quantum mechanics‚ Folger‚ a senior editor at Discover‚ notes‚ an electron‚ proton‚ or other subatomic particle is "in more than one place at a time‚" because individual particles behave like waves‚ these different places are different states that an atom can exist in simultaneously. Ten years ago‚ Folger writes‚ David Deutsch‚ a physicist at Oxford University‚ argued that it may be possible to build an extremely powerful computer based on this peculiar reality. In 1994
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forces that hold atoms together to form molecules or compounds. These categories are ionic‚ molecular and metallic substances. In ionic compounds valence electrons are transferred from one atom to another‚ resulting in formation of ions of opposite charge. Metals will lose electrons to form cations (positively charged) and non-metals can gain electrons to form anions (negatively charged); these oppositely charged ions attract each other and form an ionic compound Because the attraction of the ions is
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