Lab 10 - Physics 101 Essay

On a larger scale, the example of a Lego made motors efficiency can relate to that of a modern day car and the efficiency / energy waste that comes from it. The internal combustion engine is an engine in which the combustion of a fossil fuel mixes with air in a chamber of the operational fluid flow circuit.

The concentrations and absorbances of the red and blue dyes were used to find the concentration of the purple dyes. From the graph of the blue dye, the linear equation for absorbance was y = mx + b. From that formula came the equation y = 7.915 x 104 (x) + 0.02489, where y represents absorbance, m is slope, x is concentration/molarity, and b is the constant/y-intercept. The same set up was performed for the red dye, but the equation produced was y = 1.045 x 104 (x) +.001298. The equations found when graphing absorbance vs. concentration were used to find the concentration of the purple dyes. The absorbance for purple dye 3 on the red wavelength of 470 nm equaled 0.149 and 0.818 for the blue wavelength of 635 nm. For purple dye 1

The experiment can also be done to compare the burn rate of different colored candles.

Kinetics is the study of the rate of chemical processes. The kinetics of the reaction between crystal violet and NaOH was studied. In order to monitor crystal violet concentration as a function of time, a spectroscopic colorimeter was used. What is the rate law for decolorization of crystal violet? In order to figure this out, the rate of the reaction of crystal violet and sodium hydroxide must be found. In this experiment, the initial goals were to determine the overall rate law for the rate of decolorization of crystal violet in basic solutions as a function of time and to determine the rate law for the reaction including the actual value of k; Rate = k[A]x[B]y. The rate of a reaction was expected to depend on the concentrations

In doing so, the identity of the unknown solutions was determined through comparing the colors of the unknown to that of the known, which were dependent on the varying energy transitions the electrons went through. Therefore, the purpose of the experiment was successfully achieved. Since LiNO3 and Sr(NO3)2 were red/red orange in color, it was determined that lithium ions and strontium ions have the least amount of energy due to the fact that red has the longest wavelength in the spectrum, and colors with longer wavelengths have lower energies. The energy of each the other metallic ions increased in accordance with the energy of the wavelength emitted from that color based on the color spectrum. Potassium had the highest energy emitted, since violet is at the opposite end of the spectrum and has the shortest wavelength and highest

The Beers Law calibration experiment used many concentrations of crystal violet solutions. Each of these solutions were test and analyzed in order to determine the absorbance of each concentration The results were than graphed and produced a slope of 1.00E05 with an intercept of -2.21E-02.

Introduction: I know prior to doing this experiment that iodine mixed with starch creates a dark color and that most objects, organic and inorganic, naturally experience isotonic reactions.

Answer = A line graph will be appropriate because it supports the hypothesis because it provides clear results.

The difference was in how long it took for the bubbles to come to the surface and the solution to become clear. Also, when doing the lab, once the correct temperature for the water was reached, the experimenter pulled the beakers out one by one completing all 5 trials. This may have caused slight fluctuations in data because by the time the 4 trials were finished, the temperature of the beaker may have increased by a few degrees. As for the act of measuring, there was a slight error because the experimenters did not take the beakers off the hot plate at exactly 30.00 degrees, or whatever the temperature may be. In order to provide more accurate results, the experimenter could do all

Using the yellow tube, which included everything but starch, as the blank, each group zeroed their spectrophotometer. This was done so that any absorbance observed depends only on the amount of starch present, not on any other reagents (buffer, IKI). To zero the spectrophotometer, the wavelength was first set at 580nm, using knob 3 (45). Next, the groups made sure that the light next to “transmittance” was lit, and the chamber to be tightly closed. Having the chamber empty & closed tightly provides reference for the darkest condition possible. Using knob 1, the transmittance was turned until it read 0.0 (45). Before the groups used their blank test tube to zero the spectrophotometer, each needed to wipe the tube with kimwipes to ensure a clean reading. Turning knob 2, each group was then instructed to zero the absorbance, 0.000. Upon removing the blank, each trial was inserted into the chamber (46). The

The purpose of this experiment was studying the reaction rate of crystal violet with NaOH by observing the concentration using the MicroLAB colorimeter, monitoring how the reactant concentration affects reaction rate constant, determining the reaction order, and to calculate the reaction pseudo rate constants and the true value rate constant. The rate of the reaction of crystal violet with NaOH is given by the generalized rate law, rate = k [OH-]x [CV]y where k is the rate constant for crystal violet and CV is crystal violet, C25H30N3+. Where x and y are the reaction orders. The equation can be rewritten as:

In the Dyes and Crimes laboratory experiment, the phosphorescence, fluorescence, and chemiluminescence properties i.e. traits of several chemicals were examined using (UV) Ultraviolet lamp. Observations on color, intensity, duration of glow, etc. were analyzed to determine the traits of the several chemicals. Correspondingly, the author of the unsigned note was determined through ink extraction, (TLC) Thin Layer Chromatography, (UV-Vis) Ultraviolet-visible spectroscopy along with the Rf values for of each individual sample of ink compared to the unknown: the ink of the author on the unsigned note. Phosphorescence substances

The one candle got the water to rise up 1 inch and a half, two candles rose ¼ of an inch and the three candles got the water to rise up ¼ of an inch as well. Because of the results it was hard to match it with an explanation but the closest it supported was explanation 3 because of the water still rising a bit than nothing. Since more candles mean more carbon dioxide being created we came to conclude that there might have been CO2 molecules dissolving in the water causing it to rise a bit. The experiment disagreed with explanations 1 and 2 because there was no pressure in the outer of the flask to cause the water to rise up and the water barely rose which causes it to be that what should have caused the rising was the CO2

Task Description:The world communicates by making extensive use of the electromagnetic spectrum. For the average person this is commonly accessed using radio waves. These radio waves may be over the AM or FM radio wave bands or the radio waves that transmit our television signals. Not only are people always within a ‘phone call of each other anywhere in the world they are also able to find out exactly where in the world they are by use of

The aim of this investigation was to determine the effect of ethanol on the membrane permeability using Beta vulgaris. Beta vulgaris contains red pigments called betalain sequestered in vacuoles. The cell membrane is generally impermeable to betalain as this pigment is relatively large and cannot pass through the membrane by diffusion. (123HelpMe.com, 2015) However, by increasing the permeability of the cell membrane, betalain can leach out of the cell and colour the liquid red. The colour intensity of the solution due to leakage of betalain is proportional to the membrane permeability. To quantify the colour intensity, the light absorbance of the solutions containing a Beta vulgaris cube were measured by a spectrophotometer. These measurements were used to analyse the membrane permeability. (Flinders University, 2015)