Harvard University Department of Education Dear Graduate Admissions Committee: November 14‚ 2013 It is my pleasure to write on behalf of XXX‚ who is applying to the PhD program in Human Development‚ Learning and Teaching‚ Harvard University. I have interacted with him in several contexts: as supervisor‚ mentor‚ friend‚ and as a thesis mentee. I first met XXX in 2007‚ when I transferred to Washington‚ District of Columbia Region. S/He stood out as a Navy sailor‚ studying for Navy Chief and
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Experiment #4A- A Separation and purification Scheme Amena Alkeswani‚ PHCC Dhanlal Murally‚ PHCC September 27‚ 2012 Abstract: There are millions of different organic compounds. Most of them are found in mixtures and in order to achieve a pure form they need to be separated‚ isolated‚ and purified. However‚ there are endless numbers of possible mixtures‚ which make it impossible to have a pre-designed procedure for every mixture. So chemists often have to make their own procedures. The purpose
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greatest temperature change. Procedure: 1. We converted our .02 moles of zinc to grams 2. Next‚ we measured our 80 ml of copper II sulfate and 20 ml of distilled water and combined them in a graduated cylinder. 3. We then weighed out our zinc. 4. Then‚ we poured the copper II sulfate solution into a double nested Styrofoam cup. 5. Then we poured the zinc into the Styrofoam cups and observed a temperature change. 6. Next‚ we poured the solution through an insulated foam into
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organisms)‚ the abiotic (physical and chemical factors)‚ and the interactions made between these. They continually interact with each other‚ thus making complex systems with intersecting properties wherein “everything is connected”. In ecosystem ecology‚ we study about an individual‚ a community and a population. Interactions and relations between the biotic and abiotic components like prey-predator‚ producer-consumer are also under the study of ecosystem ecology. II. Objectives At the end of the exercise
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conditions then they may have different molar volumes. However‚ if we assume that both gases are at the same pressure and temperature then they will always have the same molar volume. How do real gases deviate from the ideal gas? Ideal gas is only a term used to represent when we are assuming the behavior of a gas fits the principles of an ideal gas‚ so in reality all gases are real gases and when we use the term ideal gas when we are doing calculations . The difference between the two is that when
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Why do people care obey the law? Why do people not do things because it is against the law in the United States. I am talking about obviously wrong things like rape and murder or robbery and I am talking about crimes where you don’t harm anyone and there is no real victim such as the casual use of drugs and running a red light when there are no cars and no police watching. Why would people follow these laws if they can’t get caught and nobody is a victim. Well I think that because most people
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Laboratory Manual) in order to prove the Law of the Conservation of Mass. Introduction In this experiment‚ we took a look at how copper (Cu0) reacts with different substances to get an end result where it is transformed back to its original state. There were five different reactions that involved copper. We first experimented with copper metal and converted it to copper (II) nitrate. We then converted copper (II) nitrate to copper (II) hydroxide. Next‚ we converted copper (II) hydroxide to copper
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British monarchy - Should they stay or should they go? Yona Oshrat The nurse Jacintha Saldanha was looking after Prince William’s wife Kate – who was suffering from morning sickness – when two Australian DJs called the hospital impersonating The Queen and Prince Charles. Believing the call was genuine she then transferred the call to the ward where Kate was staying where another nurse gave information about Kate’s condition. The nurse found hanged after the hoax call to the hospital - she committed
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EXPERIMENT 4B: THE MENDELEEV LAB OF 1869 Materials: 30 element cards‚ periodic table Aim: How can we identify elements based on their propeties? Background: Russian chemist Dmitri Mendeleev is generally credited as being the first chemist to observe patterns emerge when the elements are arranged according to their properties. Mendeleev’s arrangement of the elements was unique because he left blank spaces for elements that he claimed were undiscovered as of 1869. Mendeleev was so confident
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Compleximetric Determination of Water Hardness Caindec‚ Patricia Ysabel B. Water hardness is a measure of the amount of calcium and magnesium carbonate dissolved as Ca 2+ and Mg 2+ in water. There are no health hazards associated with water hardness‚ however‚ it causes scaling‚ as well as forming of soap suds. Compleximetric titration is one of the best ways of measuring total water hardness using a standard ethylenediaminetetraacetic acid (EDTA) solution. EDTA solution is used as it has the
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