Steam enters a turbine operating at steady state with a mass flow of 10 kg/min, a specific enthalpy of 3100 kJ/kg, and a velocity of 30 m/s. At the exit, the specific enthalpy is 2300 kJ/kg and the velocity is 45 m/s. The elevation of the inlet is 3 m higher than at the exit. Heat transfer from theturbine to its surroundings occurs at a rate of 1.1 kJ per kgof steam flowing. Let g 5 9.81 m/s2. Determine the powerdeveloped by the turbine, in kW.
Chapter 9: Cell Cycle Two types of cells are Prokaryotes and Eukaryotes Chromosome - double-stranded molecule of DNA wound around nucleosomes Chromatin - complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells. Cell Cycle – The life cycle of a cell o Consists of the Interphase and the Mitotic Phase Interphase Where a cell spends 90% of its life Interphase separated into 3 phases: G1 = Gap 1 o Undergoes Growth: making of organelles and proteins o Normal Function: Muscle cell contraction S o Synthesis of DNA o Chromosomes are duplicated to prepare for cell division G2 = Gap 2 o Continued Growth and preparation for cell division Mitotic Phase Cell Division occurs o Includes Mitosis and Cytokinesis Mitosis: division of chromosomes Cytokinesis: division of cytoplasm Cell Division o Reproduction of single –celled organisms o Development from zygote to embryo o Repair & renewal of tissues Genetic Material Duplication of chromosomes (structure made of DNA wound around protein) Separating chromosome copies to opposite ends of cell Cytoplasm Splitting cytoplasm into 2 daughter cells Mitosis o G2 of Interphase Includes nucleus, chromatin, centromeres, chromosomes, cytoskeleton, and filaments o Prophase Nucleoli disappears Spindle Fiber forms Centrosomes begin to move away from each other o Prometaphase Nuclear envelope breaks down Kinetochore appears o Metaphase Chromosomes are in center of cell Centrosomes at opposite poles o Anaphase Sister chromatids separate Chromosomes move away from each other towards the poles o Telophase Nuclear envelope re-forms, making 2 nuclei Cytokinesis o Division of Cytoplasm