Lab Experiment : Coin Lab

In my experiment, I compared if the side of a penny affected how many drops of water it can hold. I took 2 pennies, one on the head and one on the tails. I took a dropper and filled it with water. I then dropped the water onto the penny and counted how many drops of water it could hold until the water went on the paper towel. My hypothesis was that the tail side of the penny could hold more water, and it did. According to my data, the tail side average was about 1 whole drop away from the head average. This means that the tail side could hold more water. The exact average of the head side on the penny was 23 drops. The average of the tail side of the penny is 24.72727273 drops. That was super close. Although I made sure my hand was the same

In this experiment, we are trying to figure out how many droplets of water a penny can hold while face up. Before we began the experiment, we already knew that water molecules stick together as long as gravity isn't stronger than the water. In the experiment we had water, soapy water, and rubbing alcohol.

This experiment was performed to determine the difference in density between pre-1982 pennies and post-1982 pennies. In addition, we were given an unknown substance and our task was to configure what it was through calculating its volume,mass, and density. Furthermore, we were being introduced to the procedures of displacement in this experiment as well. All together, we were given the task of finding out why there was a difference in density between the two pennies. My partner, Michael Sapawa, and I first had to measure the mass of both pennies using a scale. Then we calculated the volume of the samples with graduated cylinders through the method known as displacement. We then applied our schema and drew out the formula for density, which

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.

The topic of this lab is on biochemistry.This experiment was conducted to show how cells prevent the build of hydrogen peroxide in tissues. My group consisted of Lekha, Ruth, and Jason. There were used two different concentrations of hydrogen peroxide through this experiment , 1.5% and 3%. By testing two different types it is easier to understand how the H2O2 and catalase react with one another. To do this both the yeast, which was our catalase, and H2O2 were mixed together in a beaker. Each concentration was tested out twice for more accurate results . 1.5% concentrated H2O2 had an average reaction rate of 10.5 seconds while 3% concentrated H2O2 had an average reaction rate of 7.5 seconds. From this experiment we learned that by increasing the concentration of H2O2 and chemically combining it with a catalase it will speed up the reaction. Enzymes speed up chemical reactions . The independent variable in this experiment was the concentration of the H2O2. Some key vocabulary words are Catalase, enzyme, hydrogen peroxide ( H2O2), and concentration.

The purpose of this lab is to test substances and to determine the physical and chemical properties of substances.

The U.S. penny has been a standard in our currency system for almost as long as our country has existed as a sovereign nation, but due to inflation, production costs, and the changing times we live in, it is no longer a sustainable unit of currency and only serves to increase our national deficit and waste our time. When the penny was produced for the first time in 1792 by the U.S. Mint, it was made of pure copper, featured a woman with flowing hair, and was inscribed with the words “Liberty”. Since then, the design and composition have changed numerous times to reflect our changing nation. Despite its fading glory, the penny has been kept alive by numerous false lobbying fronts and a stubborn ideology, but

In our Penny Lab, we wanted to extend what we were told to do with experimental design. We’re doing this because we wanted to prove what he thought our hypothesis had been, and a hypothesis can not be true unless it can be tested. We investigated what variables made the Penny Lab easier, or harder. As a class we decided to investigate variables like, dropping the penny from the same height, and applying the same pressure to the penny for each drop. But first we had to know what variables were, and which variables we needed to use in the experiment. The variables were, the independent variable, dependent variable, the experimental group, and the control group. We investigated this to show how much water a penny could hold, but we introduced

In this lab we will be heating up substances and use them to galvanize pennies. When you heat up the zinc, and then coat the penny in it, it then galvanizes the penny. Meaning, it helps protect the penny from oxygen and water. Afterwards, you will need to record data such as the mass of the penny. This helps keep track of what physical traits are being changed during this experiment. On part B of this experiment, you will be heating up the now galvanized pennies in order to see what reaction you get. The reaction you should receive from heating up the now zinc-covered pennies is that the pennies will change color.

During the first trial the penny held 17 drops of water. I used a dropper to put the drops of water on the penny very slowly while taking my time. In the next two trials it held 25 and 22 drops. In the last trial it held the most drops which was 30 drops of water. I think the last penny held the most

Different metals have different mass and volumes. The mass and volume of something effect the density of the metal. If pennies made before and after 1982 have different densities, they are most likely made out of different metals. The independent variable is the year the pennies were made. The dependent variables are the density, volume and mass of the pennies. The controlled variables are the number of pennies, the instruments used for measurement and the environment in which the pennies are measured.

Pennies made before 1982 and the pennies that were made after them create a significant difference. Pennies made before 1982 are made of copper (Warnick 1). Due to the change of the of the metals over the time period it must of caused a change in the pennies mass. Therefore, the density of pennies created before 1982 and the pennies produced today have different densities. Density can also be used to identify unknown substances“Density is defined as the ratio of mass to volume”

C. An unknown, rectangular substance measures 3.6 cm high, 4.21 cm long, and 1.17 cm wide.

You have probably heard of challenge coins before. They are custom made coins that are frequently used in the military in order to create unity within a squadron or to reward certain achievements. However, you may not know the fact that these custom coins are also quite popular outside the military field. They are frequently used by social clubs, government institution and even corporations. Regardless of the context in which they are used, their purpose remains the same: to unite the members of a team. So, if you are the president of a social club or the manager of a team, you should definitely consider getting some customized challenge coins. There are many companies that produce them, but we personally recommend Max Challenge Coins. We have

are the principal route by which cross-infection occurs and that hand hygiene is the single