Question 1 Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength () and frequency () are related according to the equation where is the speed of light (). The energy ( in joules) contained in one quantum of electromagnetic radiation is described by the equation where is Planck’s constant (). Note that frequency has units of inverse seconds ()‚ which are more commonly expressed as hertz (). Part A A microwave oven operates at 2.40 . What is the wavelength
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Decomposition Reaction-Electrolysis of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt
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Name: _____________________________ Submit Worksheets for Credit Stereochemistry Workshop 1. Assign the marked asymmetric centers with R or S designations. 2. Rank each of the following sets of substituents (highest priority substituent = 1; lowest priority substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers
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Electronics is taking over our lives Parents must have boundaries when it comes to letting their kids watch television or use the computer. Obesity‚ earning screen time‚ and doing other activities are some reasons that screen time needs to be monitored. Parents have the responsibility to encourage healthy behaviors and limit unhealthy ones for their children. School children who watch television more than two hours a week are obese. When children are watching television
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Chemistry and Society Jessica Yadira Lopez CHM/110 November 10‚ 2014 Jennifer Cruz Chemistry and Society Chemistry plays a huge and important role in society; Society depends on the accuracy and precision of measurements for products sold by the retail industry‚ such as a gallon of gasoline‚ a bushel of corn‚ or a liter of bottled water. These measurements have to be precise and accurate when it this relates to how farmers sell their products such as wheat‚ corn‚ milk‚ peanuts‚ and cotton‚ by
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a research and development department and so forth‚ operates according to functional organization. The functional structure provides employees‚ as well as their appropriate departments‚ with a clear objective and purpose for their work. In other words‚ employees within a marketing department know that their job is marketing and‚ as a result‚ those employees can focus on improving their marketing work and even specialize in a specific area of marketing. On the other hand‚ functional structure can
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So many new technologies have appeared in the past half century that it’s impossible to list them all. But these 10 high-tech breakthroughs stand out over the last 50 years because they’ve revolutionized the way Americans live. We look back at their beginnings‚ as well as where they’ve taken us today. 10. Organ transplants. In 1954‚ Dr Joseph Murray removed the kidney from one human patient and implanted it in another. The recipient accepted the kidney as its own rather than rejecting it as a
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Part 1 A） Chemist 1: New product development This career role involves the development of new paints to meet changing market needs. The chemist would be working as a member of a team developing and testing new colloidal paints to suit specific purposes. This might include weatherproof paints‚ which retain their colour and are resistant to solar radiation‚ or indoor paints that can be easily and repeatedly washed. Chemist 2: Environmental monitoring This career role as a public servant could
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"How Cell Phones Have Changed Our Lives" What invention do you use every day? What invention could you not leave your house without? For me‚ it would be a cell phone. Forty years ago if someone would have said that everyone would have a cell phone‚ people would think they were crazy. According to a U.N. Telecom Agency report‚ the world has about six billion cell phones. That’s roughly one for eighty-six of one hundred people. There are several reasons why I believe that the invention that I think
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thinkers‚ but never so fully elaborated. He states that all matter is composed of eternal‚ indivisible‚ indestructible and infinitely small substances which cling together in different combinations to form the objects perceptible to us. The Greek word for indivisible is atomos. This theory gives birth to the atom. Democritus was a Greek philosopher who lived between 470-380 BC He is the Greek to whom the conception of the Atomic theory is attributed. Democritus proclaims the atom to be the
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