Lab Report Physics

In this lab experiment our main focus was to get skillful in using tools such as the metric ruler, balances, thermometer, and graduated cylinder to capture measurements of length, mass, temperature and volume. Additionally, this lab helped us to become more familiar with the uncertainty of measurements, as well as becoming efficient with rounding our measurements to the correct numbers of significant figures. Our results are measured consistently with rounding to the closest answer we could possibly acquire as the data can tell you.

There are several sources of error to this experiment due to random and systematic errors. The only source of random error was the measurement that we took through the graduated cylinder which was only accurate to the nearest 1%. We took the largest error from this one percent, which was +/- 3. The largest relative error this yielded was only 3%, so this did not affect how precise this experiment was too much. We can still make this more precise by making the masses of the water larger. For example if we started the masses at 300mL and went up by 50mL, the largest error this would yield would be 2% due to the largest error being +/- 5. This would cause smaller errors in the amount of water.

The experimental error in this lab included the question whether the digital scale was as precise as it could be, how the cooling time affected the water in the hydrates, and any miscalculations that could have occurred. The digital scale could have been more precise since they are more precise scales that could deliver more accurate masses in this lab.

Procedure: Using distilled water, premeasured containers and objects determine displacement of fluids and density of objects. Use ice and heat measure temperatures in Celsius, Fahrenheit and Kelvin.

Abstract: This experiment introduced the student to lab techniques and measurements. It started with measuring length. An example of this would be the length of a nickel, which is 2cm. The next part of the experiment was measuring temperature. I found that water boils around 95ºC at 6600ft. Ice also has a significant effect on the temperature of water from the tap. Ice dropped the temperature about 15ºC. Volumetric measurements were the basis of the 3rd part of the experiment. It was displayed during this experiment that a pipet holds about 4mL and that there are approximately 27 drops/mL from a short stem pipet. Part 4 introduced the student to measuring

First we will find the mass of the empty graduated cylinder to the nearest 0.01gram. Then we will fill the graduated cylinder about halfway to read its volume. After, we will find the mass of the graduated cylinder with the water to the nearest 0.01 gram subsequently, we will calculate the mass of the water alone to the nearest 0.01 gram. Later, we will calculate the density of the water. Finally, we will calculate the percent difference between our experimental value of the density with the accepted value for the density of water using the same equation the was used in the last step of Part

The volume of a small test tube and a thin-stemmed pipet were determined in this section of the lab. Water was poured into a small test tube until the water reached the very top edge of the test tube. The test tube was then emptied into a plastic 25 mL graduated cylinder and volume was measured and recorded into data table 3. A think-stemmed pipet was completely filled with water. Drops were carefully counted and emptied into the empty plastic 25 mL graduated cylinder until the water level reached 1 mL. The number of drops in 1 mL was recorded into data table 3. The thin-stemmed pipet had a total volume of 4 mL and that was also recorded into data table 3.

Rules is a great book that allows its readers to view autism from a perspective not commonly shown. Catherine’s perspective varied from being a protective sister to being neglected child. After reading the incident with Ryan on pages 29-31, I was inspired by Catherine’s dedication to protect David. Catherine tends to worry about how others view her brother and this causes her to very defensive, even when people are not trying to be more or pick at David. For example, Catherine got upset when Kristi turned on the music and asked David to dance with her.

I will share my newfound knowledge through this paper and I will discuss my finding with my peers and other people who enjoy chemistry. We have been discussing both water displacement and density in class; I assume the relevancy of this lab was to help people who learn better kinesthetically a chance to learn the material in a way they learn best.

Water does NOT mix with vegetable oil because the oil raised to the top very quickly in the experiment. When the container was upside down the oil went right back to the top again. Vegetable oil has a lower density because it was on top of the water. The mixture was a heterogeneous mixture because you could see the individual parts. If droplets of soap were added to the mixture I think it would go right to the bottom because its density is bigger than the water and the oil.

In the third stage of this experiment, the density of a liquid was determined and compared to known standards. A 100ml beaker was filled to about half-full with room-temperature distilled water. The temperature of the water in ◦C was recorded in order to compare to known standards later. A 50ml beaker was then weighed on a scale in order to determine mass and recorded. A sample of the distilled water with an exact volume of 10ml was then placed in the 50ml beaker using a volumetric pipette. The 50ml beaker with the 10ml of water was then weighed again and the initial mass of the beaker was subtracted from this mass to obtain the mass of the 10ml of water. With the volume and the mass of the water now known, density was calculated using d = m/V and recorded in g/ml. This process was then repeated to check for precision and compared to standard values to check for accuracy. Standard values were obtained from CRC Handbook, 88th Ed.

A 2-cm layer of water was added to each column on the surface. There was still air at the top of the column. Then the lid was placed on each column and turned ½ a turn. The lid was not tightened all the way. Then all four of the columns were placed in a well-lit space.

Observations were recorded in a spreadsheet. Observations Readings were taken of the volume and pressure each time as the little man was dragged in 1nm. The pressure at volume 8nm3 was 1.00 atm. The next reading was 0.02 pressures and the volume was 7nm3. The pressure at volume 6nm was 0 atm.

In this experiment, accuracy and precision were measured through the density of water (H2O). Accuracy is defined by how close the result comes to the true value. Precision refers to how close two or more measurement are to each other. A volumetric flask, graduated cylinder, pipet, and buret were used to measure the water. A balance was used to measure the grams of each trail.

The apparatus shown in Figure 1 will be used. It consists of a quarter circle block attached to a cantilevered arm with a rectangular surface on the other end. The pivot point on the arm corresponds to the center of radius of the block. With no water in the tank, and no weights on the scale, the arm is horizontal. As weights are added one by one to the scales, water can be added to the tank so that the hydrostatic force balances the weights and bring the arm back to horizontal.