If one goes out before we wake up‚ we will get two more of the same type of battery and watch it during the day. Variables Our variable is the different brand of batteries. The controlled condition is the same type of flashlights. Results Our experiment showed that Rayovac outlasted all of the other batteries we tested by at more than two hours. The Eveready battery‚ which is a regular‚ non-alkaline battery‚ lasted only 6 hours and 35 minutes. The Duracell lasted 15 hours. The Energizer lasted
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Purpose This experiment shows how different concentrations of acids and bases in a solution affect its pH level. When acids and bases are combined in a solution‚ they neutralize each other. This means that depending on the concentration of both acids and bases in a solution‚ the pH will vary. A neutral pH level is 7; anything below that level is known as an acidic solution‚ while anything above is known as a basic solution. To find out the pH‚ the solutions will be diluted and tested with different
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In the eye opening documentary‚ The Human Experiment‚ directed by Don Hardy and Dana Nachman‚ the many health dangers of thousands of harmful chemicals in everyday products are exposed. The film explores the lives of people who have been affected by the ubiquitous chemicals found in our food and our homes. The film addresses the battle against powerful industries that are determined to keep consumers in the dark about the dangers of many of their products. The fight against dangerously lethal chemicals
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References: Garcia‚ C. (2005). Laboratory experiments in organic chemistry. Manila: University of Santo Tomas. http://www.stevens.edu/wit/research/samples/plipsy_organic_chemistry_lab_report.pdf Retrieved Jan 1‚ 2013) http://www.nbs.csudh.edu/chemistry/faculty/nsturm/CHE301/Thin%20Layer%20Chromatorgaphy%20Experiment
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During fluidized bed combustion potassium and calcium from biomass ash can react with quartz (SiO2) from the bed sand already at the normal operation temperatures of 700−900 °C‚ forming a layer of Ca‚K-silicate onto the bed particle. The layer becomes thicker in time‚ and the particle size increases. The layer is sticky‚ and the bed particles can agglomerate together increasing the bed particle size further. During unsteady operation of the boiler‚ or on an occasional excursion to high temperature
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Chem 1212L-345 Lab report Experiment #20: Temperature Change and equilibrium Woochul Jin Jeeyoon Kong‚ Alla Asmerom Hagos 03/22/2011 Woochul Jin Chem 1212L-345 Experiment #20 Lab Report Temperature change and equilibrium Introduction: In this experiment‚ we will find out how the variation of the value of an equilibrium constant with temperature can be used to determine the enthalpy (heat)‚ entropy (randomness)‚ and free energy (G) changes associated with the system in question
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is essentially a wooden block with wheels and a rubber end‚ to provide the collision with a cushion upon impact. Weights- these were added to the trolley every turn. This was the independent variable and it was the only variable we had chosen to change. Ramp- this is the means in which we are going to create the initial movement and cause the trolley to move. Stopwatch- this is how we will measure the dependant variable (time). Method Firstly we prepared our equipment for the first ‘run’
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given the bulk density and minimum void content. Equipment * Electronic Balance * Metal Cylinder (AS Compliant) * Metal Scoop * Tamping Steel Rod Test Procedure 1. Determine the weight and volume of the cylinder (for lab experiment written on side). 2. For the mixed aggregates ensure they are well mixed. Now fill the cylinder with the aggregate to 1/3 the height of the cylinder using the scoop. 3. Compact the aggregate with the tamping rod giving 25 strokes without
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[ print page ] 04.05 Chemical Reactions: Combustion: Lab Worksheet and Rubric Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Procedure: 1. Iron (IIII) and copper (II) sulfate solution Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction. 2. Lead (II) nitrate and potassium iodide solutions Pour about 2.0 mL of lead (II) nitrate into
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I. Objective The first objective of the measurement of thermal conductivity & one-dimensional heat conduction experiment was to identify three different metal specimens by comparing their experimentally determined thermal conductivities to known thermal conductivity values of existing metals. The second objective of the experiment was to establish a connection between the thermal conductivities & temperatures of the metal specimens. Thirdly‚ the contact resistance of the interfaces between
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