Aluminum Foil Lab

The United States has to reconfigure the measurement of goods due to not using the metric system.

Purpose: Weighing objects. Figuring out the density with an object by calculated volume and Archimedes’ Principle.

This experiment was performed to observe differences in density based on the chemical makeup of an object. Pennies minted before 1982, pennies minted after 1982, and an unknown metal sample was tested to see if there were any differences in their densities. Ten pennies from each category and the metal sample were weighed using a scale to find mass and the displacement method was used to find their volumes. The masses and volumes were then used to calculate the densities of the pennies (D=m/v). The density of the pre-1982 pennies were 8.6 g/mL while the post-1982 pennies were 6.9 g/mL. The metal sample’s density was 1.7 g/mL. Following the experiment we were given the real densities of each item to calculate the percent error with the formula

Introduction: Do you think you could measure the average thickness of a sample of M&Ms without directly measuring selected M&Ms? The answer is "yes," and in this activity you will make direct and indirect measurements of the thickness of M&Ms. You will compare the results and evaluate the reliability of each method of measurement. Be sure to view the tutorial on the proper use of the vernier caliper. Please re-visit the information on when to cite sources.

Abstract: The objective of the lab is to determine the volumes of the polystyrene spheres with three different measuring tools: Water Displacement, Analytical Scale, and Triple Beam Balance Scale. The experiment is meant to help understand the concept and application of precision and accuracy in experimental measurements. Accuracy is a measure of how closely the results of repeated measurements are to the true value of what is being measured. Precision is the variability in the results from the repeated measurements, and how close the repeated measurements were to one another. In this lab, the method for measuring the volume of the polystyrene spheres is done with the previously stated tools: Water Displacement, Analytical Scale, and Triple Beam Balance Scale. The standard deviation for the entire classes volumes and masses are recorded to determine the densities.

2. In order to calculate the density of a solid or liquid sample, what measurements are needed?

The following laboratory experiment calls for a moderate understanding of what a hydrate is, what its properties are, and how altering a hydrate’s chemical structure may cause the release of both water and acidic vapors. A hydrate itself is a chemical, typically a crystalline salt, which incorporates water (H2O) into its chemical structure. For example, the compound CoCl2 is merely cobalt (II) chloride, however, take the original compound and attach a water molecule and it becomes CoCl2 + 6 H2O. In other words, the original cobalt (II) chloride is now cobalt (II) chloride hexahydrate.

Science ADI Lab Chart How does the temperature and the surface area to volume ratio of water affect the rate of water evaporation? We believe the rate of water evaporation is affected by the temperature and surface area to volume ratio. The hotter the temperature of the water is, the faster it evaporates, while lower temperatures slow down the process of evaporation. Also, the bigger the surface area is, the quicker water evaporates, while water in containers with smaller surface areas take longer to evaporate.

The purpose of this experiment was to ascertain the total amount of atoms thick a single sheet of aluminum foil contained, after a final determination of the thickness of the piece of foil itself, calculated in centimeters with the development of a sufficient, reliable method and use of prior knowledge. This experiment is conducted by first taking a square slip of aluminum foil at approximately 7.62 centimeters on each side, with the specific length and height recorded to refrain from inaccuracies. The scientist must then examine the mass of the aluminum foil using a scale, using density as the given numerical value, 2.7 grams, as well its equation to calculate the volume of the foil, determined by density equals mass divided by volume. The determined value can then be used to obtain the thickness of the foil, executed through the formula, length times width times height, the width being the measurement that is to be obtained. Certain about the thickness of the aluminum foil, the

Resonance In an Air Column By Tara Sabzvari Introduction The purpose of the lab “Resonance In an Air Column” was to determine the resonant lengths of an air column for a given frequency of sound by finding the local speed of sound. The experiment was focused on the resonant lengths for a fixed-free end medium as the air column was closed on one end and open in the other. In addition, waves reflect off both fixed and open ends of a medium, in this case an air column. Furthermore, resonance is the condition in which the frequency of a wave equals the resonant frequency of the wave’s medium, which is one of the objectives of this lab.

Introduction The objective of this experiment was to find the speed of light using a microwave oven. Microwave ovens use a particular microwave frequency to excite molecules of water. Since water is present in marshmallows, this means that microwaves heat up and they do it quickly. Marshmallows are mostly sugar and water filled with lots of small air bubbles.

For the growth of all plants, specific levels of pH in the soil and in the plants themselves are important. These levels of pH affect the growth of the plants. This experiment explores and investigates how different pH environments affect the growth of Mung Beans. This following experiment will also explore the damaging effects of salinity (salt) on seed germination.

1) What are the main advantages and disadvantages of using a hotwire to measure flow velocities?

Enclosed is the technical report as requested on 19th March 2015 for the written assessment in the Technical Literacy course. I have chosen ‘material testing equipment’ as my topic hence the report is titled ‘Material Testing Equipment - Hand held shear vanes and scala penetrometer. The report outlines the hand held shear vane and scala penetrometer and their use in geotechnical investigations.

Spring steel 60Si2CrVA foils with a thickness of 120 μm were purchased from Feintool Co, Shenzhen, Guangdong and used as the contacting foils. Foils with a diameter of 15 mm were cut out of the 60Si2CrVA foils. The under surface of these round foils were burnished with SiC papers and then polished with silk, and the thickness of contacting foils were reduced to ∼100 μm. After polishing, the round contacting foils were cleaned with acetone and then ethanol. The surface roughness of the polished surface of the contacting foil was ∼Ra 100 nm. A 3M black polyester tape (thickness of 80 μm) with a layer of glue (thickness of 10 μm) was then sticked to the upper surface of round contacting foils and covered with micro wave-like surface of