PHILOS 2XX3 Lecture : Locke Personal Identity

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salmonsquirrel304

20 Jan 2012

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Locke thought that different kinds of entities may have different persistence conditions. In the case of inanimate bodies the removal or addition of a single atom results in a change of identity. In the case of living things the removal or addition of atoms need not result in a change of identity. Biological entities remain numerically the same as long as they partake of the same life. Oak tree growing from a tiny plant to a great tree remains the one and the same entity throughout the change. This is because there is an organization and distribution of parts that allows the whole entity to continually engage in the operations constitutive of its life. The organism remains the same because it has the same life. Acorn question: from the moment the acorn becomes capable of being an oak tree (i. e. after fertilization) it is a new biological entity and so the life of the tree begins.

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Air conditioners operate on the same principle as refrigerators. Consider an air conditioner that has 7.00 of refrigerant flowing through its circuit each cycle. The refrigerant enters the evaporator coils in phase equilibrium, with54.0 of its mass as liquid and the rest as vapor. It flows through the evaporator at a constant pressure and when it reaches the compressor 95 of its mass is vapor. In each cycle, how much heat is absorbed by the refrigerant while it is in the evaporator? The heat of vaporization of the refrigerant is 1.50×105 .Express your answer numerically in joules. =5.15×105 Correct Part BIn each cycle, the change in internal energy of the refrigerant when it leaves the compresser is 1.20×105 . What is the work done by the motor of the compressor?Express your answer in joules. =1.20×105 Correct Part CIf the direction of the refrigerant flow is inverted in an air conditioner, the air conditioning unit turns into a heat pump and it can be used for heating rather than cooling. In this case, the coils where the refrigerant would condense in the air conditioner become the evaporator coils when the unit is operated as a heat pump, and, vice versa, the evaporator coils of the air conditioner become the condenser coils in the heat pump. Suppose you operate the air conditioner described in Parts A and B as a heat pump to heat your bedroom. In each cycle, what is the amount of heat released into the room? You may assume that the energy changes and work done during the expansion process are negligible compared to those for other processes during the cycle.Express your answer numerically in joules. =

PHILOS 2XX3 Lecture : Locke Personal Identity

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