Thermal Conductivity Report Essay Example | Topics and Well Written Essays - 1000 words

Thermal Conductivity Report - Essay Example The negative sign indicates that heat is transferred in the direction of decreasing temperature. The heat flow will be in the perpendicular-to-the-cross-section direction, i.e. one-dimensional. To determine how much heat is provided, we will calculate how much heat is taken (absorb) by the cold water at steady state condition. (it is the condition at which heat supplied is equal to the heat removed). For this we use the relation Where Q is the rate of heat transfer, s is specific heat capacity of water , Tout is the temperature of water at outlet and Tin is the temperature of water at inlet. Putting the value of Q in (ii), we get The apparatus consist of accessories for providing heat at one end of sample composite bar and for taking heat at the other end of the bar through water. The water inlet temperature and outlet temperature was measured through thermometers. To determine the volume of water the measuring flask was provided. To determine the temperature at different points along the bar thermocouples were provided. The whole apparatus was well insulated to ensure one dimensional heat flow. The heater was switched on and as the circulation of water through the cavity. Readings at thermocouples 1,2,3 and 4 were taken when the steady state condition was achieved. The volume of water circulating was measured and time taken for this. The inlet and outlet temperature of water is also measured. Heat transfer has taken place because of the difference of temperature between two ends of sample bar (consisting of copper and stainless steel). From graph slopes of copper and stainless steel shows that drop in temperature per unit length in copper bar is less as compared to stainless steel, which indicates that copper has let more heat to be transferred through it. Similar result is given by the calculated thermal conductivities showing that copper thermal conductivity is greater as compare to stainless steel. A

Compare education system differences between US and China Essay

Compare education system differences between US and China - Essay Example For most, practical knowledge is more important than textbook knowledge.† (Chen, 2001). However, the Chinese system is totally focused on examination and higher scores. Their ultimate goal of education was concerned with the success of the student in his/her achievement, which would let them earn money and fame in future. In the American education system, the school structure holds a grade system where kindergarten through fifth grade is classified as elementary school, sixth through eighth as junior high school and ninth to twelfth as high school. However, in China, the grade division is split a little differently, with the kindergarten to sixth classified as elementary school, and seventh to twelfth as middle school. In addition to these structural differences, the US schools use a holistic system of education where the students’ school grades, test scores, extracurricular activities, code of conduct, application essays as well as a personal interview are taken into account. On the contrary, the education system in China solely focuses on the academic results and hard work exercises. Unlike in US, the entire school system of China is very rigid with guidelines and predetermined classes, while the American system exercises more freedom on the part of the students. For instance, in US, a stude nt has the freedom to choose his or her classes which is totally unheard of in China, as every class and syllabus, all through the high school to college is set in advance, for the reason of avoiding the complications accompanied with the personalized education system. The concept of education has a greater influence on the students’ reflection towards the society in the future. The major dissimilarity between the American and Chinese education lies in their teaching systems. This system has a profound impact on the students’ attitude of learning and pursuing