In this week’s lab we had to determine the density of a quarter, penny, and dime. My question was “How does is each coin?” Density is the amount of mass in an object. To find the density of each coin in this lab, we used a triple beam balance to find each coin’s mass and a graduated cylinder to find their volumes. With all this information, I can now form a hypothesis. My first hypothesis is if I put a quarter in a graduated cylinder and get the volume and weigh it, then it will have the greatest density. If I put a dime in a graduated cylinder and get the volume and weigh it, then it’s density will be between the quarter and the penny. And finally, if I put a penny in a graduated cylinder and get the volume and weigh it, then it will have the lowest density out of the three coins. In almost every experiment, there’s an independent and dependent variable, a constant, and a control group. The independent variable in this lab was the coins. The dependent variable was the density. The constant was the amount of water. In this lab, there was no control group . …show more content…
To find the density of the three coins, I followed a short and simple procedure. First, I used the triple beam balance to find the mass of each coin to the nearest tenth of a gram. Next, I filled the graduated cylinder with 50 mL of water. Then I put the quarter in the graduated cylinder. In my data table, I recorded the volume of the quarter and the the water in the graduated cylinder. Next, I removed the water and the quarter from the graduated cylinder and poured 50 mL of water again. I repeated this until I got results for all three coins. To find the volume of each coin, the formula I used was volume of water and coin - initial volume of water ( 50 mL ). To find the density, I divided the mass and the volume of each
Click here to unlock this and over one million essaysShow More
Unknown number of 1 oz. silver coins in sealed plastic rolls Unknown number of silver coins in vacuum sealed sheets, unknown number of sheets Unknown number, denomination or weight of gold coins Estimated value $10,000 (2) 1 pint mason jars of pennies one full one half full (2) 1 pint mason jars of nickels one full one half full (3) 1 pint mason jars of dimes two full one half full (2) 1 pint mason jars of quarters one full one half full Unknown
In the source “Penny Wise, or 2.4 cents Foolish?” It specifically states,”A number of countries, including Australia, New Zealand,Brazil,Finland, the Netherlands, Norway, Sweden, Switzerland and Britain,have already dropped their lowest- denominated coins, without dire consequences. ”This evidence is saying that many other countries have given up their lowest coin and that coin for the United States is the penny worth one cent. The evidence demonstrates that the United States needs to get rid of the penny as well, even if the vote on it isn’t high, the people needs to have this coin gone because in the long run, the United States won’t have anymore money because of making this money and it costs more than what it’s even
Objectives In this lab, you will investigate the percent composition by mass of CO2 in Alka-Seltzer® tablets. In addition, you will find out how much CO2 is released into the atmosphere as 2 Alka-Seltzer® tablets chemically react in vinegar. Procedure 250-mL beaker 100-mL graduated cylinder Scale 60 mL of Vinegar 2 Alka-Seltzer® tablets
The density of the penny was 4.68 g/cm3 before the experiment and 4.43 g/cm3 at the end of the experiment. The density of gold, though, is 19.3 g/cm3. Since the densities of the penny and the gold are different, the penny clearly did not change into another element. The gold color of the penny was a result of the flame that it was held above melting the zinc that it was coated in with the original bronze colored coating of the penny, creating an alloy with a shiny yellow color. Since neither of the pennies, silver colored or gold, changed densities throughout the experiment and each retained their own properties; the properties of copper; no new elements were
Pennies aren't significant. A quote from the text, “Pennies take up too much space on our dressers at home,” (Sommer, Paragraph 3) This text basically tells the reader that pennies are significant to people's homes. The readers can also infer that the penny is a waste of space because of their worth.
The penny costs more than it is worth. Millions of dollars are going to waste into producing them and it can just add the money up. The cost of producing and distributing one pennie is 2.4 cents(Sommer). Every penny that is made, taxpayers lose money.
Also, the images on the penny have changed over and over giving everyone something new to look at. For example, in the text the author suggests, “The first pennies, minted until 1857, were very large-larger than our modern-day quarter and had different images of the Statue of Liberty on the front. Several other versions of the coin were minted before finally producing the familiar Lincoln penny in 1909. Since then, ten varieties have been minted, mostly because of the changes in metal content” (Story, para 2). According to the evidence, the images on the penny continue to change due to production costs.
Next, there is mass this contains 5 sections in it these are: • challenge
Also, the penny is too heavy and takes up space. The government has been trying to ship pennies to military bases in foreign countries.(Source 2) They have been doing this because they need to use currency to buy food or merchandise. Pennies are said to take up too much space in people’s homes like dressers and cabinets.(Source 2) This was said during a speech during a discussion to remove pennies or to keep them.
In Source #2, the text states "Pennies are "too heavy and not cost-effective to ship,”" You may ask, "what does cost-effective mean? Well cost-effective means "producing desirable results without costing a lot of money" (Source #2). As we can see, they cannot produce pennies without more money than the pennies
Next, we determined the mass of the penny by placing it on a balance. The mass of the penny was 2.47 grams. Afterwards, we placed the penny in a beaker filled with 20 mL of 6 M HCl. In the end we put the beaker in the fume hood and allowed it to sit overnight. During day two of the penny lab, we removed the penny skin from the beaker using tweezers.
Once dissolved, fill the rest of the volumetric flask up to the line on the neck of the flask. Again mix the solution. Use four, 10mL volumetric flask, and label them from 1-4. Add approximately 2mL of copper sulfate pentahydrate into flask 1, 4mL to flask 2,
On our paper we predicted the amount of pennies that could fit in the boat before it sank. We tested the boat in the water and added pennies one by one. We then calculated the mass of pennies that fit in the boat and the density of it. The purpose of this Lab was to make a boat that holds as many pennies as possible and understand how to calculate
Measurements, Calculations, and Significant Figures Measurements, calculations, and significant figures are vital mathematical terms used to understand the basic concepts of physics. Knowing how to properly make measurements and apply the necessary calculations to obtain accurate answers will surely prove beneficial in physics, but having that knowledge will also help you throughout your entire life. Therefore, it is important to understand the processes and numbers involved when using measurements, calculations, and significant figures. Measurements are used to identify the specific characteristics of an object, such as length, size, and amount. One must use the proper measuring device, depending on the conditions of the experiment and