The Effect of Temperature on the Rate of Diffusion Damsel C. Bangcal Aira May V. dela Cruz Jacqueline L. Lacuesta Richelle Jem P. Jobog Group 1 Section U-2L November 17‚ 2014 ___________ 1A research proposal submitted in partial fulfillment of the requirements in General Biology I Laboratory under Proj. Joan O. Adajar‚ 1st semester‚ 2014-2015. INTRODUCTION Molecules undergo constant motion and move in regions with a higher concentration to a lower concentration
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The speed of light is a well-established premise in physics. Centuries before‚ it was often heard by scientists like Johannes Kepler and Rene Descartes that the speed of light was infinite‚ having the ability to travel at any distance immediately. A notable physicist named Galileo Galilei was one of the first scientists to ponder this phenomenon of light‚ and how to determine the speed of this unknown. In order to do so‚ Galilei formulates an experiment with an assistant. While standing on one hilltop
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Lab Report: How Temperature affects Reaction Rate Aim: The Aim is to investigate how temperature can affect Reaction Rate. The experiment will be performed by heating equally sized and weighted lime stones with equal amounts and concentration of Hydrochloric acid at different temperatures. The temperatures will be 35˚C and 40˚C. We will measure the reaction rates by observing gas release of the reaction between lime stones and Hydrochloric acid. The amount of gas release at different
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"Why Distant Objects Please" 1 Distant objects please‚ because‚ in the first place‚ they imply an idea of space and magnitude‚ and because not being obtruded too close upon the eye‚ we clothe them with the indistinct and airy colours of fancy. In looking at the misty mountain-tops that bound the horizon‚ the mind is as it were conscious of all the conceivable objects and interests that lie between; we imagine all sort of adventures in the interim; strain our hopes and wishes to reach the air-drawn
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showed that an increase in concentration of the reacting species resulted in an increase in reaction rate. Both graphs have a positive gradient which clearly indicates that concentration increases the reaction rate. The hypothesis also proposed that as temperature increases the speed of the reaction would decrease‚ this is evidenced in graph 7 which shows a negative decrease in time as the temperature of the solution increases. This decrease can be modelled by the exponential formula T=12.9e-0.0249t
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Enzymes lower the amount of energy needed in a chemical reaction. This happens because enzymes are catalysts‚ so they speed up the activation rates that occur in living organisms. Without enzymes‚ it would be difficult to break down particles like food in the digestion system. Enzymes are all very specific to what chemical reactions they will work with‚ and the temperature‚ pH‚ and salt concentration have to be a specific levels in order for the enzyme to function. The structure of each enzyme has
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INTRODUCTION: This is a standard circuit which can be used to adjust the brightness of mains lights and the speed of AC motors. It uses a triac‚ diac and has a radio-frequency interference (RFI) noise suppression circuit built into it as well. The circuit controls the average power to a load through the triac by phase control. The AC supply is applied to the load for only a controlled fraction of each cycle. The triac is held in an OFF condition for a portion of its cycle then is triggered ON at
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seen in the graph‚ the higher the temperature the shorter the time is for the Sulphur to be created. If it is looked as one continuous line‚ the first part of the trend line shows a steep‚ straight and constant decrease; then the 2nd part is not as steep and has a more gradual decline. Moreover‚ it shows how a reaction at 20°C a slower time for the cross to disappear compared to 40°C and especially 60°C. Both graphs show how temperature has a great effect on the speed of sulfur formation covering the
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Depending on the medium and temperature‚ the time it takes for sound waves to travel vary. The hypothesis states that if the temperature in the air increases‚ then the speed of sound will also increase because faster-moving particles transfer energy quickly. The data collected supports the hypothesis. Therefore‚ increased air temperature affects the speed of sound because the molecules move faster‚ which causes the energy to be transferred quickly‚ which then increases the speed of sound. In the data‚
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What determines the perceived brightness of objects? Luminance is a physical and objective measure of the intensity of light. The sensation elicited by different luminances is called brightness. However brightness is a subjective measure as it is the perceived amount of light emanating from an object. It may seem logical to expect that luminance and brightness are directly proportional and that two objects that reflect the same amount of physical light into the eye will look the same brightness
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