Answered: A pump delivers 4m3/min of water from…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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When water is pumped into a water tank 20 m above a lake with a flow rate of 70 l/s, 20.4kW of electrical power is consumed. Determine the efficiency of the pump-motor group by ignoring the friction losses in the pipes and the change in kinetic energy. Determine the pressure difference between the inlet and outlet of the pump.
A turbine is driven by a system that enters the turbine at the ff. conditions: 500 kg/h, 44 atm, 450 deg C, 60 m/s linear speed. The steam exits at a point five meters below the inlet stream of the turbine with the following conditions: atmospheric pressure, 360 m/s speed. 70,000 W of shaft work is delivered by the turbine while 104 kilocalories/h heat is lost. Here are the questions to be answered: 1. Why is the value of Wexp 0? (Explain) 2. Given the above values, can you calculate the Wflow? (Yes/No)
Billy flew from New York to Cincinnati and had a closed container with a closed outlet to drink from. The container has a diameter of (D. = 5 cm) and height of (H. = 27 cm). The container is filled with 72% of water. The container's outlet has a diameter of (D. = 1 cm) and height of (H, = 30 cm). Last moment container was opened was in New York at an atmospheric pressure of 1072 hPA. When Billy landed in Cincinnati the atmospheric pressure was 850. When Billy opened the bottle once again water discharged because of difference in pressure. 1. Calculate instantaneous flow rate at the point when the closed containers outlet was opened. Assume pressure in the closed container is the difference between cities = 222 hPa and air pressure in Cincinnati 0. Figure 1: Do = Icm Ho = 30 cm %3D 27 = H. Cm Hw Dc =5 Cm

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A pump delivers 4m3/min of water from 100kpa to 300kpa. The inlet and outlet pipe diameters are 15cm and 12cm respectively. Both pipes are on the same level. The inlet and outlet temperatures are both 25C and mass density of water is 997kg/m3. Calculate the pump work in kw