Wednesday, November 27, 2019

Density Lab Report Essay Example

Density Lab Report Paper Density is defined by its mass per unit volume, and is most often written in mathematical terms as; Mass is usually given in grams, g, and volume is given in cubic centimeters, g/ com, or, grams per millimeter, g/ml_ Density is not a property that depends upon the amount of substance present. For example, one gram of lead and one ton of lead have the same density. Density also does depend on temperature. For instance cold water is denser than warm water; ice is less dense than both. The method used for determining the density Of a substance depends on the nature f the substance. In this lab the densities of unknown irregularly shaped solids and liquids was determined. Accuracy and precision of the results will be estimated, and attention Will be paid to the correct use of the significant figures. The experiment approach that will be used will tell the mass and volume of the metal and liquid determined by measuring these two quantities with a graduated cylinder and Beirut. Procedure: a) The density of metals First obtained a quantity to unknown metal. Recording the unknown number, I used only one type of metal for this part of the experiment. The unknown metal that was instructed to use was a chunk, therefore, used a Some graduated cylinder, When using the Scam cylinder, I filled it with water to approximately the ml mark. Then recorded the exact volume of water that was added. Placed the cylinder and water on the balance and recorded the mass to every 0. Lag. Added the metal to the graduated cylinder until the water level increased by approximately 2_Mom_ Being sure to tap the sides of the cylinder to release any air bubbles. I then recorded the volume of the water plus teal to the nearest 0. ml Then recorded the total mass of the cylinder, water and metal. Added more pieces of metal to the cylinder until the water level had increased by 2. Mi. Then recorded the exact volume Of water plus metal and total mass of cylinder, water and metal. Repeated the procedure twice more. Being careful not to go over the Mimi mark. And recording the data each time. Calculations: determined the total volume of metal in the cylinder by su btracting the volume of water from the volume of water plus metal. We will write a custom essay sample on Density Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Density Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Density Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Then found the corresponding ass of metal by subtracting the mass of the cylinder and water from the mass of the cylinder, water and metal, I plotted out the graph showing the total mass of metal on they-axis, and the volume on the x-axis. I found the slope of the line by taking two random points from the graph, performing the slope formula and finding the density. From the table provided, I identified the unknown metal to be silver, b). Determining the density off water/ethanol mixture. Obtained an unknown solution from the instructor. Then recorded the number of the solution. Then rinsed a burette with a little of the ethanol solution, and filled the burette with that same solution. Read the burette level to the nearest 0. Ml. Then weighed an empty Mimi Erlenmeyer flask. Turned the knob Of the burette and put approximately 23. Ml of solution into the flask. I read the burette again, to O_Osmosis and recorded. Next weighed the flask and its contents, by placing the flask on the balance and recording the temperature Of the solution. I then determined the density Of the solution by taking the mass of solution and dividing by the volume of solution. Repeating the procedure twice more using a clean flask and the same balance each time. Calculations: For each of the three trials calculated the density of the solution and determined the mean, average deviation from the mean, percent precision and the range. Then drew a calibration curve from the data given on page 17 of my Laboratory Manual, Discussion: Based on the value of my density, and based on the literature values given on page 16 of my Laboratory Manual, the unknown metal is silver. The density I had obtained trot the slope of the graph was 9. Egg/ml. En compared my density to the chart given, looking for a similar density, The density of my unknown metal was not exact with a particular metal given in the chart, but kept in mind that the density of silver can vary depending of the state it is in, Error Analysis: The possible sources of error in finding the density of the unknown metal and liquid would have to be my consistency throughout the experiment had approximated with my bare eye and was not consistently exact. Therefore, there was an inaccuracy in reading the volume displaced from the graduated cylinder and the Beirut.

Saturday, November 23, 2019

Free Essays on The Early Empire

The Early Empire- Roman Architecture Rome has so many beautiful features about it, that I didn’t know where to begin. I decided that I would talk about the architecture of early Rome. There are plenty of architectural buildings built in early Rome. These buildings set the building point for a lot of famous buildings today. For example, the Colosseum is just one of the buildings that a lot of sports arenas have imamate. I will talk about this and other buildings and give you information about them. With the birth of the empire there emerged a desire to glorify the power of Rome by erecting splendid buildings and civic monuments. It was believed that art should be created in the service of the state. Although Roman expansionism left a wake of death and destruction, it was responsible for the construction of cities and the provision of basic human services in the conquered areas. To their subject peoples, the Roman conquerors gave the benefits of urban planning, including apartment buildings, roads, and bridges. They also provided police and fire protection, water systems, sanitation, inhabitants, including gymnasiums, public baths, and theaters. Thus, even in defeat, many peoples reaped benefits because of the Roman desire to glorify the empire through visible contributions. Although the Romans adopted structural systems and certain motifs from Greek architecture, they introduced several innovations in building design. The most significant of these was the arch, and, after the second century, the use of concrete to replace cut stone. The combination of these two elements resulted in domed and vaulted structures that were not part of the Greek process. One of the most outstanding of the Romans, civic projects is the aqueduct, which carried water over long distances. The Pont du Gard is part of an aqueduct system in southern France tha... Free Essays on The Early Empire Free Essays on The Early Empire The Early Empire- Roman Architecture Rome has so many beautiful features about it, that I didn’t know where to begin. I decided that I would talk about the architecture of early Rome. There are plenty of architectural buildings built in early Rome. These buildings set the building point for a lot of famous buildings today. For example, the Colosseum is just one of the buildings that a lot of sports arenas have imamate. I will talk about this and other buildings and give you information about them. With the birth of the empire there emerged a desire to glorify the power of Rome by erecting splendid buildings and civic monuments. It was believed that art should be created in the service of the state. Although Roman expansionism left a wake of death and destruction, it was responsible for the construction of cities and the provision of basic human services in the conquered areas. To their subject peoples, the Roman conquerors gave the benefits of urban planning, including apartment buildings, roads, and bridges. They also provided police and fire protection, water systems, sanitation, inhabitants, including gymnasiums, public baths, and theaters. Thus, even in defeat, many peoples reaped benefits because of the Roman desire to glorify the empire through visible contributions. Although the Romans adopted structural systems and certain motifs from Greek architecture, they introduced several innovations in building design. The most significant of these was the arch, and, after the second century, the use of concrete to replace cut stone. The combination of these two elements resulted in domed and vaulted structures that were not part of the Greek process. One of the most outstanding of the Romans, civic projects is the aqueduct, which carried water over long distances. The Pont du Gard is part of an aqueduct system in southern France tha...

Thursday, November 21, 2019

Obama Speech Essay Example | Topics and Well Written Essays - 750 words

Obama Speech - Essay Example According to Obama, we all have an obligation for those who are less fortunate. I certainly agree with this statement. Indeed, the world would be such a horrible an uninhabitable place were it not for the many people who have dedicated their lives to changing the lives of the less fortunate. The society depends on the contribution of all the people within the society to function properly. Therefore, all the members of the society including the less fortunate are an important part of the society. They are the largest economic drivers and the pillars of economy would collapse if the less fortunate failed to participate in the society. Therefore, it is our primary purpose to put the less fortunate at the forefront of our needs since we all need each other to survive.Agreeing with Obama seems to make sense since having an obligation to the society means having an obligation to ourselves too. The success of the whole society means success to our personal objectives. Seeking to achieve per sonal goals without caring for the society qualifies as selfishness. There are many things that we can do to the less fortunate to uplift their living standards. In doing so, overwhelming gratification is experienced and in the process, the society becomes a better place to live for all. It is true that our individual salvation depends on collective salvation. A better society is better for an individual too. One of the most important characteristics of the Obama’s speech is his attribute to Tedd Kennedy.... By reflecting to Tedd, Obama was in a position to put weight to his sentiments. He had already given a testimony of his life experiences, as an exemplary example of service to humanity. Therefore, his attribute to Tedd was meant to give authority to his speech by acknowledging Tedd. He used Tedd as another example of how our individual contribution to the welfare of the society can bring such a tremendous and positive change to the society. It is through his attribute to Tedd that people could see a living testimony of a selfless individual who have done his level best to serve the less fortunate within the society. This was an appropriate and effective way of delivering his message to his audience. It is always important to give credit to the societal icons that have made the world a better place to live in. By appreciating Tedd’s efforts, Obama made his point clearer and more powerful. It is also worth noting that the attribute made it possible for Obama to confirm his speec h. From the attribute, Obama sought to make it clear that everybody who cares about the society would deliver similar sentiments. This made his speech authoritative and assertive too. Obama comes out as a people minded person. It is evident that he puts the interests of the community ahead of his personal gains. Throughout the speech, he gave different experiences that molded him to be the person he is today. Although he recounts the days, in which he used to be an ordinary person. He recounts some of the most challenging times in service to humanity, â€Å"it wasn’t easy, but eventually, we made progress† (Obama and Olive 774). This is a clear proof of his people caring persona. However, his involvement in community service made him see the wider and deeper