This essay Conduction, Convection & Radiation has a total of 783 words and 12 pages.
Conduction, Convection & Radiation
St. Patrick’s Comprehensive
The aim of this investigation is to find out which material will be the best insulator
Amount Of Water
I think the polystyrene cups will work better because the polystyrene is made up plastic that has had air pockets blown into it, this helps keeps heat in because heat cannot travel well over open air particles, and I think the clay mug will be the worst insulator because of it’s large open top.
We heated some water to 100°C then prepared six cups for testing. We got one plain plastic cup, a polystyrene cup, a glass beaker, a polystyrene cup with a lid and a plastic cup with a lid and a regular 150ml clay cup. We measured the water to the 100 ml level in the beaker and then quickly put the water in the various containers then pressed then timed one minute and took a temperature reading with a thermometer. We did the same for another four minutes then wrote then down in a table. We made this a fair test by using the same amounts of water in each cup, timing it exactly and getting the water from the kettle to the cup as quickly as possible.
See Separate Sheets
I found that the glass plastic and clay mugs are bad conductors, convectors and radiators. I also found that polystyrene is a good insulator, conductor and radiator. The lids help stop heat escaping from the top, this is called convection. The best insulator was the polystyrene cup with a lid, this is not unexpected as is shown in my prediction. Polystyrene is just plastic with tiny air pockets blown into in, this acts as a cell for heat of which it cannot escape, and the lid acts as a further safeguard as that is where the majority of the heat is lost. An advantage of using polystyrene cups is that unlike plastic the heat does not go straight through and burn your hand, it never gets too hot to handle. The worst insulator was the clay cup, this is not because the sides could not contain heat but because the opening is so great at the top, and because cups are coated to keep as much heat/cold in as possible, this just acts as a channel, forcing more heat upwards and out of the cup.
I believe my results are accurate and that I have collected sufficient data to enable me to make that claim. We tried to make the test as fair as possible, although there is still several possible errors that could have affected my results; the time it took to get the boiling water from the kettle into the cup, start the timer and put the thermometer in, you may think that separately each little action took only a fraction of a second, but if you add all the times up you get a large margin for error, the water could have cooled several degrees in that time and although it is only a small amount it still makes the data incorrect nonetheless, my proposed method to overcome this problem would be to add salt to the water, so that it boiled over 100 C, then put it in the cup, add the thermometer and wait until it had dropped to 100 C before starting the stopwatch. Also the room temperature may have increased or decreased between the time of the first and last experiments, this too could have had an effect on the results, to overcome this I think that I could perform each of the tests several times at different times of the day, this would give me and average temperature reading form which I could eliminate anomalous results, and the only other problem I have with the experiment itself is that the cups had been used several times before, I think this could have had an adverse effect on several of the cups, especially the polystyrene, slightly melting it’s inner coating to collapse the air pockets inside, this could be rectified by simply using new clean cups. Although I wish I had more time to get extra results to work out an average, to eliminate
Topics Related to Conduction, Convection & Radiation
Essays Related to Conduction, Convection & Radiation
Soft Drink Industry Case StudySoft Drink Industry Case Study Table of Contents Introduction 3 Description 3 Segments 3 Caveats 4 Socio-Economic 4 Relevant Governmental or Environmental Factors, etc. 4 Economic Indicators Relevant for this Industry 4 Threat of New Entrants 5 Economies of Scale 5 Capital Requirements 6 Proprietary Product Differences 7 Absolute Cost Advantage 8 Learning Curve 8 Access to Inputs 8 Proprietary Low Cost Production 8 Brand Identity 9 Access to Distribution 9 Expected Retaliation 9 Conclusion 10 Su
Case analysis of the Soft Drink IndustryCase analysis of the Soft Drink Industry Table of Contents Introduction 3 Description 3 Segments 3 Caveats 4 Socio-Economic 4 Relevant Governmental or Environmental Factors, etc. 4 Economic Indicators Relevant for this Industry 4 Threat of New Entrants 5 Economies of Scale 5 Capital Requirements 6 Proprietary Product Differences 7 Absolute Cost Advantage 8 Learning Curve 8 Access to Inputs 8 Proprietary Low Cost Production 8 Brand Identity 9 Access to Distribution 9 Expected Retaliation 9 Conclu
MexicoMexico Mexico Country Profile Country Formal Name: United Mexican States (Estados Unidos Mexicans). Short Form: Mexico. Term for Citizen(s): Mexican(s). Capital: Mexico City (called Mééxico or Ciudad de Mééxico in country). Date of Independence: September 16, 1810 (from Spain). National Holidays: May 5, commemorating the victory over the French at the Battle of Puebla; September 16, Independence Day. Mexico Geography Size: 1,972,550 square kilometers--third largest nation in Latin America (after
DrugsDrugs TOBACCO Tobacco is a plant grown for its leaves that are smoked, chewed, or sniffed for a variety of effects. It is considered an addictive substance because it contains the chemical nicotine. The tobacco plant is believed to have originated in the Western Hemisphere. The cultivated species most often grown for North American and European tobacco products is Nicotine Tabacum. The leaves of the plant are prepared for smoking, chewing, or sniffing. In addition nicotine tobacco contains over
EnviormentalismEnviormentalism Evironmentalism: The Next Step Broad Social Change Through Personal Commitment Introduction In the last thirty years, America has witnessed an environmental revolution. New laws like the 1963 Clean Air Act and the 1974 Safe Drinking Water Act forged new ground in political environmentalism. Social phenomena like Earth Day, organized by Dennis Hayes in 1970, and the beginning of large-scale recycling, marked by Oregon\'s 1972 Bottle Bill, have help change the way Americans think a
Malaysia Country ReportMalaysia Country Report As the world prepares to move into the twenty-first century, many nations are rapidly developing their agricultural and manufacturing sectors. As these burgeoning industries become a larger part of the nation’s economy, the nation finds its population restructuring and streaming to the areas of growth. Just as the people are trying to compete for their survival, the nation is fighting its way to center stage in the world economy. The development of these countries is tied
TerrorismTerrorism 1) It is very difficult to resolve the international problem of terrorism for several major reasons. Terrorists usually don\'t claim responsibility for their actions until the fuse is lit, it\'s not a case of Jack The Ripper sending an ear to the cops and warning them who his next victim will be. Terrorists usually do claim responsibility for their actions after the media is aware that something happened, this gains recognition for their cause, which is often the reason they resort to
UzbekistanUzbekistan Current Political Economic Situation Political situation Uzbekistan, the most populated republic in Central Asia with almost 25 million in-habitants, became independent, after the collapse of the Soviet Union, on 31 August 1991. Its constitution, adopted in 1992, is rather liberal in its statement. It introduces a Presidential system with a Parliament (Oly Majlis/Supreme Council) elected by universal suffrage, enabling several parties to present candidates. Mr Islam Karimov, former he
Malaysian Economic Policy and FDI.Malaysian Economic Policy and FDI. BACKGROUND AND COUNTRY ATTRACTIVENESS. Malaysia is the second fastest growing economy in the South East Asian region with an average Gross National Product (GNP) growth of eight-plus percent per year in the last seven years. Since independence in 1957, Malaysia has moved from an agriculturally based economy to a more diversified and export oriented one. The Malaysian market is fairly openly oriented, with tariffs only averaging approximately fifteen percent and
AboriginesAborigines History The first people to live in Australia were called Aborigines. They migrated there about 40,000 years ago. The continent remained relatively unknown by outsiders until the 17th century. The first Europeans to settle were British convicts in 1788. They arrived at Botany Bay in southeastern Australia. Australia grew as a group of British colonies during the 19th century, and in 1901 the colonies federated to form a unified independent nation. National Government The federal parli