Essay on Project Design Plan Int1 Task 3

Paper towels are known for their absorbency. These towels are made of paper and are attended to be used once. Paper towels are used for cleaning and dry a variety of surfaces. During this lab, my group observed several brands of paper towels. Those brands included our school paper towels, Viva Vantage, Best Choice, and Bounty Basic. Our school paper towels were around 800 square feet long, had an average cost per roll of $5.25, and was single ply. This paper towel was brown in color, rough in texture, and dotted in pattern. Viva Vantage had 59 sheets per roll, had an average cost per roll of $2.09, and was single ply. The Viva Vantage was soft in texture, white in color, and had to apparent pattern. Best Choice had 111 sheets per roll, had

My hypothesis was that the water will have the most amount of drops and the soapy water will have the least amount of drops.

Three paper towels A, B, and C where tested on absorbency. This experiment was tested twice. Paper towel A was 26.5 by 28 centimeters. Paper towel B was 26.5 by 28 centimeters. Paper towel C was 15 by 28 centimeters. Scissors were obtained and each paper towel was cut to 13.5 by 15 centimeters. The weight of the three paper towels at this size was 0.9 grams dry for paper towel A, paper towel B weighed 0.8 grams dry, and paper towel C weighed 1.2 grams. Three beakers weighing 12.2 grams each were obtained. Each beaker was filled with 100ml of water with the outcome of them weighing 128.1 grams each. The weight of each paper towel dry was deducted from the weight of each paper towel. Paper towel A was left to soak for seven seconds.

Absorbency affects: skin comfort, static build-up, dimensional stability in water, stain removal, water repellency, and wrinkle recovery.

The purpose of this experiment is to find out which brand of paper towel, Decorator or

For this experiment, the amounts of Red 40 and Blue 1 were quantified in six different Kool-Aid samples through the use of a spectrophotometer. This was completing by performing serial dilutions on both dyes, Red 40 and Blue 1, and then creating calibration curves for each of the six samples. The absorbance and maximum wavelength values were obtained from the spectrophotometer for each individual drink sample. Beer’s Law was used to discover the concentration of

For this experiment we were instructed to conduct our own procedure with whichever combination of treatment we thought best would yield the greatest amount of absorbance of betacyanin. My lab partners and I chose to do treatments with ethanol a mild organic solvent, 1% triton a mild detergent solution , and a combination of ethanol and triton.

Figure 2: Dye percents versus absorbance in a control, 10%, 20%, and 30% azide solutions.

The results indicate that my hypothesis was correct. I performed this test because I wanted to know if Viva was more absorbent that the local store brand to determine if the extra cost was worth it. My findings will help other consumers make a decision based on absorbency as to which paper towel to purchase.

The study was conducted in 1957, where 71 male students from Standford University were in the experiment. They were told they had to be in the study and that it was the help them improve experiments in the future. They were also told that a sample of the students would be interviewed after they had completed the experiment. Each subject was urged to be completely honest beforehand. Each subject was brought into a room to wait, the secretary office, then after a few minutes they would be taken to the experiment room. Once there, they were given two different tasks to do for thirty minutes a piece. First, they would be asked to put 12 spools onto a tray, empty, then refill for the first thirty minutes. During this time, the person conducting the experiment would jot down information on paper. Then they were asked to do another task for 30 minutes which included 48 square

8. Use the plastic forceps to remove the potato cylinders from the beakers (keep them together in the same group), and blot off the excess solution weight on them with the paper towels.

concentration, record the absorbance readings at a fixed wavelength, and plot the absorbance vs. concentration data. The wavelength of 520 nm was selected for experiment Part

Then, each group of students received the necessary materials to complete the experiment. When the students received the cups, they labeled cups to distinguish between the salt solution, distilled water, and control group. After weighing the cups and finding the mass of the cucumbers, the students poured 50 ml of water in one cup, 50 ml of salt solution in the other, and left the control cup empty. Then, the students placed the cucumbers into the cups and waited 30 minutes for the results. After the 30 minutes, the students removed the cucumbers from each solution and dried the cucumbers with paper towels. The students then weighed the cucumbers again and recorded their results. Lastly, the students found the difference from the original mass of the cucumbers and recorded their results.

An unglazed paper was obtained and several drops of food item/substance to be tested were then added. An observation was then made for a translucent grease mark on the paper. Results were then recorded

Table 1: absorbance measurements over time of the diluted lysozyme standard, saliva, and the diluted synthetic tears.