If Dr. Hayes’ believes his research is correct, why won’t he release his raw data for independent review? There was no difference in the effect of atrazine on both genders. For both genders, once the level was past 1 ppb, a steady decrease of size is noted, but when less than 1 ppb, a minimal increase is seen. In both trials, the data had the same pattern of size increase and decrease with the levels of atrazine despite the different levels, thus the experiment was repeatable. The effect of an exposure that is less than 1 ppb typically resulted in a small increase in size, but once the atrazine level was 1 ppb or greater, there was a steady decrease in the muscle’s size.
The results were expected, since a difference in the odors of the enantiomers was detected, and the polarimeter showed that the two enantiomers rotated light to about the same degree in opposite directions. In the polarimetry experiment, the two absolute values of degrees of rotation were not exactly identical due to small errors caused by dust or other impurities in the sample. In the oil wafting experiment, some may not have been able to differentiate between the two enantiomers if their noses lacked the chiral receptors required to recognize this
925 which is more than .05. Thus the null hypothesis of equality of variances may be accepted, and it is concluded that the variances of the two groups are equal. It can be seen from Table 6, that the value of t statistic is -2.849. the t value is significant as its p value is which is less than .05.thus it is concluded that the ability to handle pressure of experienced players is more than that of amateur players. Table 7 – descriptive statistics of the groups with regard to reboundability. Group Statistics group N Mean Std.
Rate of Reaction Mg / HCl R2 = 0.96 The R2 value is close to 1 which means the data is reliable and accurate. The data for 28.0°C is the furthest away from the line of best fit probably because either the temperature or time was not measured properly. This graph evidently proves my hypothesis right. Although the room temperature experiment was not as close to the line of best fit as others, we can roughly estimate the time taken for the magnesium to dissolve in the hydrochloric acid.
AIM: To model diffusion in a practical form and investigate the effect of surface area to volume ratio. HYPOTHESIS: It is hypothesised the smaller the cube the quicker and bigger the rate of diffusion will be and with a larger cube there will be a smaller percentage of diffusion due to its bigger volume. VARIABLES: There are independent variables, dependent variables, and controls. the one that is being tested and the one that is the inconsistent variable in the Independent variable like the volume and surface area of the agar cubes. The variable that is kept consistent is the dependent variable such as the percentage of diffusion of pigment in the agar cubes.
THE RATE THEORY OF CHROMATOGRAPHY This theory describes the actual process going on inside the chromatographic column with respect to the time taken for the solute to equilibrate between the stationary and mobile phase. The kinetic effect depends upon how much time the mobile phase spends in contact with the stationary phase. The rate of elution affects the band shape of a chromatographic peak. It is also affected by the different paths available to solute molecules as they travel between particles of stationary phase. The reason for band broadening was well explained by Van Deemter equation for plate height HETP = A + B/u + Cu where u is the average velocity of the mobile phase.
Secondly, use a variable response deadline; the participant can choose their own deadline, improving the accuracy across subjects. Finally, using the response latency approach within the GNAT test as its more reliable simply because each point is a continuous value. However, this is something that the IAT already has. Although, the GNAT can “effectively asses the strength of associate on between a concept and the poles of an attribute dimension” (Nosek and Banaji, 2001) the IAT is more reliable simply as it, “shows good reliability, which is a prerequisite for measuring individual differences,” (Rezaei,
Chemistry IA – Kinetic Experiments Practice Internal Assessment Investigating the relationship between KI concentration and its rate of reaction with H2O2, which is measured using a spectrophotometer. Research Question How will changing the concentration of KI affect its rate of reaction with hydrogen peroxide? Calculated as inverse of time taken for the blue-black coloration of tri-iodide ion and starch solution, measured using a spectrophotometer. Introduction: The rate of reaction of a chemical reaction can be affected by several factors, one which is the concentration of the reactant(s). According to the collision theory, it tells us that as the concentration of the reactant increases, there will be an increase in the amount of molecules,
In order to interpret it in terms of physical chemical process, the mechanism of interaction and the kind of adsorption process should be analyzed. To proceed further an updated of the membrane regions is required in which the properties of lipid membranes depends on water organization as part of the structure. In consequence, its thermodynamic properties must be redefined. The updated model is described in Figure 6A. The regions of 1 nm thick at each side of the bilayer, denoted as an excluded volume for solutes in the previous session, contain around 18-20 water molecules per lipid in phosphatidylcholines [50,51].
Thus, Fig. 3 also presents the comparison of the curves calculated from the NRTL model with the experimental results for the quaternary system. In addition, the low RMSD values for NRTL and UNIQUAC confirm the ability of these models provide the LLE data in this work. Furthermore, successful prediction using the obtained binary interaction parameters by the simultaneous correlations (NRTL and UNIQUAC) of all the experimental LLE data of this quaternary system contributes to create a reliable conceptual design and process simulation and optimization of acetic acid extraction from
The measurements between the evaluators were similar numbers with all measurements within 2mm. The skinfold measurement turned out to be reproducible because the numbers between the evaluators were less than 2mm difference for all measurements. This suggests the skinfold measure can be reliable because the measurement could be reproduced between different evaluators. However, the reliability from the results in table 1 may not correlate with the skill required to obtain and separate the adipose tissue from the muscle. 2.
Therefore, I hypothesized that the more borax that is used, it would be more bouncy, because there is more of a protective layer to it. My hypothesis was right, because the result that I got was an average bounce height is 39.8 cm for the 1g of borax and 46.6 cm for the 5 g of borax. The result shows the significant different between the 2 different amount of borax added to the ball. Even though some of my trials are a little off, my average bounce height in cm is around the range of the more precise average which is the grade’s average and class’ average.
The topic of research is, “how fast does an Alka-Seltzer tablet make gas?”. In the experiment, the scientists will be measuring the chemical reaction rates that occur, when 1 Alka-Seltzer tablet is placed in a specific temperature of water. The independent variable during the experiment will be the temperature of the water (degrees Celsius). The dependent variable during the experiment will be, the rate in which gas is produced (in seconds). The constants of the experiment, will be the amount of water used and the Alka Selter compound.
Most of the time the partial implementation gives the correct result as compared to the function is implemented completely. This scheme gives fewer gates delay allowing a higher pipeline frequency. Unlike frequency selection, the data speculation scheme can recover from mis-speculation by locally re-executing the incorrect computations only. This type of local error recovery requires both hardware (runtime) and design support. To re-execute incorrect computations, a simple approach is adopted in which computations are restarted from a known correct state.
To find the number of moles of each reactant added, volume in liters was multiplied by the molarity (concentration). 2. The second step is about finding the theoretical yield, which will help to determine the correct amount of Ca(OH)2 can be made in chemical reaction. However, before doing this, it’s necessary to find whether CaCl2 or NaOH is a limiting reagent. For each test, the limiting reagent is found by multiplying the number of moles of the reactant by 1 mole of Ca(OH)2 and dividing then by a number of moles of reactant from the reaction.