Thermodynamics Lab Report Example | Topics and Well Written Essays - 1750 words

Thermodynamics - Lab Report Example It is a common observation that when a hot body is brought in contact with a cold body, transfer of heat takes place from the hot body to the cold body. If both the bodies are identical in material and dimension and the entire system is thermally insulated then it can be found that both the bodies achieve same temperature indicating that the transfer of heat takes place until both the bodies are in the state of thermal equilibrium. This process of heat transfer is known as heat conduction. Conduction in the language of physics can be explained by the phenomenon of transfer of kinetic energy (heat) by interaction between the vibrating particles (lattices) or movement of free electrons in a body. In this experiment, linear heat conduction in an insulated long slender brass bar as shown in Figure 1 is examined. We assume the brass bar to be of length L, a high temperature is kept constant at one end, and a low temperature on the other. The reason for thermally insulating the brass bar circumferentially is to ensure that heat conduction takes place linearly along the axis of the bar. The equation governing the heat transfer is known as Fouriers Law, and can be is written as: The thermal conductivity is a function of temperature, but it can be treated as a constant over small temperature ranges. The thermal conductivity of a material is dependent on the material and it varies with direction, structure, humidity, pressure and temperature change. The transfer of energy takes place in solids by two methods: We will study Fouriers Law through this experiment by finding the thermal conductivity for brass and comparing this value to the real actual value from one reference experiment. To do this we will calculate the cross sectional area of the bar and the gradient slope from a plot of measured temperatures vs. length. We can then use these values in an arranged version of Fouriers Law to find the thermal conductivity by the following relation; The experimental

Week 7 response papers Essay Example | Topics and Well Written Essays - 500 words

Week 7 response papers - Essay Example In agreement with the student, the move to have manufacturers bear the burden of disposing their products has changed the benchmarking activities of companies. Companies have to change their manufacturing and business processes as noted in response to the new regulation at least to some extent (Esty and Winston, 2006). Since the companies have to bear the burden of disposal, it is important for them to create partnerships. Partnering with other players will assist organizations in ensuring responsible recycling as in the case of Dell and FedEx. Once again, in agreement with the student, it is important for employees in the service industry to be trained on environmental audits. This is because effective sustainability is achieved by involving everyone in the company as noted by Ahmed, Montagno, and Sharma (2004). Marshall and Toffel (2005) note that sustainability can be extremely elusive if people are ignorant of facts related to the environment and waste management. This means that at all levels, workers should be trained about environmental auditing. Companies will have to change their benchmarking activities so that they become more responsible in the disposal of outdated electronic products as noted by the student. This is influenced by the fact that used electronic equipment such as computers, TVs, and cell phones are some of the quickly growing wastes in the world (ScienceDaily, 2009). The disposal of CRT monitors and tube TVs has been a thorny issue as the student notes. It is true that it is more effective to control pollution and encourage sustainability by assigning producers the burden of managing wastes as opposed to disposing old electronic equipment in landfills in agreement with Blewitt (2008). The student introduces two important factors in the waste management and sustainability debate – the issues of legality and accountability.