Find out the amount of energy spent, Mechanical Engineering

Assignment Help:

Find out the amount of energy spent:

6 cubic metre of water is to be lifted to a height of 40 metres and delivered having velocity of 4 metres/sec. If this operation takes 12 mintues, find out

1.      the amount of energy spent

2.      H. P. utilized

3.      H. P. of water-pump whose efficiency is 80%

Solution

Work is needed to be done on water to

1.      raise its potential energy, and

2.      Develop KE of water.

 

A.      Potential Energy = W × H

                  Here,         W = Weight of water lifted in Newtons

                      One litre of water = 1 kg = 9.8 Newtons

                       ∴ 6 cu. m. of water = 6000 litres.

                       ∴ W = 6000 g  N

                         ∴ Enhance in PE of water = 6000 g × 40

                                                 = 2352 × 103 N-m.

B.      Work done to provide KE to water = W V2 /2g

                                                                      = (6000 × 42)/2

                                                                        = 48 × 103  N- m.

Whole amount of energy spent = PE + KE

                                                     = (2352 + 48) × 103  N-m.

                                                            = 2400 × 103  N-m.

H. P. utilized in (S. I. units) = (2400 × 103) / 746

                                            = 3217 units

If pump efficiency = 0.8 or 80%

H. P. required for pumps

= 3217 /0.8  = 4021 units.


Related Discussions:- Find out the amount of energy spent

Find out the forces in the members of the tower, Find out the forces in the...

Find out the forces in the members of the tower: Find out the forces in the members of the tower. Solution By symmetry, ∠ AFG = ∠ AGF = θ and HG = 7.5 m; while AH = 3

Explain systematic way to reach a 2d formation, Question 1: There are d...

Question 1: There are different devices which may be used to attract the attention of the customers and persuade them to purchase merchandise. a) Make a list of at least te

Transverse electric field, Transverse Electric Field Consider a charged...

Transverse Electric Field Consider a charged particle (e.g. an electron) moving along  X-axis  with constant velocity  v ,  i . At  x = 0 , it enters into a region where a unif

Evaluate resultant of the system - mechanics, Evaluate resultant of the sys...

Evaluate resultant of the system: Q: Figure given below shows two vertical forces and couple of moment 2000 Nm acts on horizontal rod, which is fixed at end A .  Determin

Specific heat - thermodynamics, Specifi c Heat: The specific Heat of ...

Specifi c Heat: The specific Heat of a solid or liquid can be usually defined as heat required for raising unit mass through one degree temperature rise. That is,   dQ = m

What are the various types of wear found in cutting tool, What are the cond...

What are the condition that could allow a continuous chip to be formed in a metal cutting ? How is metal removed in metal cutting? Illustrate the Process with neat sketch. What

Registering small scale unit of entrepreneurship development, Registering a...

Registering a Small Scale Unit: Small Scale and ancillary units (i.e. undertaking with investment in plant and machinery of less than Rs. 6.0 million and Rs. 7.5 million respectiv

Identification of pressure welds, Q. Identification of Pressure Welds? ...

Q. Identification of Pressure Welds? Pressure welds shall be identified as follows: a. Generally each weld shall be stamped adjacent to the weld with the welder's identity c

Cylinder bore-engine terminology , Cylinder Bore: The nominal inner diame...

Cylinder Bore: The nominal inner diameter of the working cylinder is called the cylinder bore and is designated by the letter D and is usually expressed in millimetre (mm).

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd