Cooler Research Answers

3. Analyze: What do you notice about the density of the Styrofoam pieces? The density remains the same.

because each of the objects displaced the water by 1 mL, their mass over that mL is their density.

After taking the mass of water and combining a “dry ice pellet … the mass of the water in the cylinder is less than… at the beginning” (644). More experiments were completed with various

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.

I will be doing this experiment to understand density of water compared to the volume of an object. D=m/v=mass/volume

Christopher and Kate noticed that after a rainstorm some of the rocks in their yard appear to shrink. They wondered how the mass of the rocks changed when dissolved in water. To

We found the density of the unknown object #6 to be 5.9(g/mL). We then use the table to identify the metal, and the result is that the name of the metal is zinc. Since the density of zinc is 7.14 and that is the closes number to our density, we determine that our unknown object is zinc. Our average density for the unknown liquid #5 is .779(g/mL). The closes density of a known liquid on the table is .792(g/mL), so we concluded that our liquid #5 is cyclohexane which has a density of

CHM130 Lab 6 Exploring Density Name A. Data Tables Place your completed Data Tables here Part IIIa (3 points) Volume of water in graduated cylinder (mL)10 mlMass of rubber stopper (g)11.15Volume of water and rubber stopper (mL)16.5 Part IIIb (6 points) Volume of water in graduated cylinder (mL)20Mass of iron nail (g)3.66Volume of water and iron nail (mL)20.5 Part IV (20 points) Type of Aluminum FoilMass (g)Length (cm)Width (cm)Volume (cm3)Thickness (cm)Regular.63g15 cm 10.02 cm.21 cm3.0014 cm Heavy Duty.97g15 cm10.01 cm .36 cm3.0024 cm B. Follow Up Questions Show all work for questions involving calculations. Part I Use the concepts/vocabulary of density to explain why the liquids formed layers in Part I of the procedure. (8 pts)

Step 2: The volume of both tanks is equivalent to 84,780. You utilize the recipe, and module the numbers to get the answer.

3. The volume of a fixed mass of a liquid sample increases as the temperature rises from 20 to

During college, students should be able to research and analyze their sources. It is an important life skill. By using the ability to research, they can find articles with credible, reliable, and relevant information to get the best and dependable research. People who use these techniques will find each of these components essential to the authenticity of an article. These skills would be able to help students and researchers discover trustworthy and reliable sources. Each of the different components in a quality research makes it solid and dependable. Credibility is how believable or truthful the research, and whether the researchers have the credentials to do research in that area. Reliability is the reputation of the article’s source, and if the authors considered any biases. Relevancy is how current the article is or how important it is now. Students conducting research in college need to be able to critically analyze sources for credibility, relevancy, and reliability in order to determine their usefulness in a research paper.

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.

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

15. Determine the mass of the water by using the water’s density (specific to the initial temperature) and the volume of the water. Remember, density = mass/volume. You can look up the density of the water at your specific temperature at

b) An empty beaker was weighted. Then, water was filled in the beaker. The temperature was recorded at uniform intervals.