Water is pumped from a lake to a storage tank 15 m above at a rate of 70 L/s while consuming 15.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump-motor unit (b) the annual cost of running the pump it if operates an average of 12 h per day, 7 days per week, and electricity costs 8 c per kwh. [66.9%, $ 5382]

Water is pumped from a lake to a storage tank 15 m above at a rate of 70 L/s while consuming 15.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump-motor unit (b) the annual cost of running the pump it if operates an average of 12 h per day, 7 days per week, and electricity costs 8 c per kwh. [66.9%, $ 5382]

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

See similar textbooks

Similar questions

For the direct shear example shown below, if F = 33 kN, AAB = ACD = 2146 mm2, the average shear stress in the internal vertical surface AB (or CD), = ______ MPa. Calculate your answer to 1 decimal place.
Question 1 The state of stress of an element is given as follows. The value of normal stress are = = 30MPa, o, = -10MPa and major principal stress , = 50MPa .Then the value of shear stress is. I
The principal stresses represent the maximum and minimum normal stress at the point. True False
Assume o, = 500, o, = 300, TTy = 250, orield = 350. Answer the following questions. Click here for equations. Oy Txy Ox Part A Determine the maximum normal stress along a plane where there is no shear stress. О 131 МPа O 669 MPa O 368 MPa O 234 MPa O 569 MPa Submit Request Answer
this question is not for a grade. it is only a study question. submitting it is not a violation of the honor code
Approve that? k - P = = (₁ + ² = 1 M²) ² ·(1 P 2 Po k - P = = (₁ + ^² = 1 M²) = ²1 (1 P 2
17 Bending causes increase in the thickness of the sheet metal. Select one: True False
• When the state of stress is represented by the principal stresses, no shear stress will act on the element. True or False?
20 ksi 40 ksi 60 ksi The differential element above represents the state of plane stress at a point in a steel beam. Which of the following best represents the magnitude of shear stress on a differential element at the same point but oriented 40 degrees clockwise from the element shown? O52.5 ksi O46.3 ksi 12.5 ksi
Determine the resulting maximum value of the normal stress. Specify the orientation of the plane on which these maximum values occur. **The answer is tensile stress is 0 ksi at 90 degrees. **The answer is compressive stress is 7 ksi at 0 degrees. Can you explain how that is? This was my thought process: I know that tensile would be zero because the force P is actually going inwards and not outwards. I know that means that there would be a compressive force. I am confused on the angles, how is a tensile force going 90 degress if there technically is no force in the tensile direction. And how is there a compressive force at 90 degrees if there is a stress? thank you!