User Account

All Pages

Need it fast, Mechanical Engineering

Assignment Help:
PROBLEM 1 (30 points)
Consider a Boeing 747-400 at weight close to the maximum takeo? weight (MTOW) cruising at
Mach 0.82 at an altitude of 32000 ft.
(a) How much thrust is needed to maintain cruise? Express your answer in kN and as a fraction of
the weight.
(b) What is the diameter of a sphere that would have the same drag as the Boeing 747-400 at the
same cruise conditions? How does the sphere diameter compare to the wing span of the 747?
PROBLEM 2 (30 points)
D
Shear stress t
Blood cells sustain serious damage (hemolysis) when they are subjected to shear stress exceeding
150 Pa. During blood transfusion, blood ?ows through a syringe needle with typical inner diameter
D= 0.603 mm. See chart at http//en.wikipedia.org/wiki/Needle_gauge_comparison_chart.
It’s the 20-gauge needle). The intent is to transfuse blood as quickly as possible without damaging
the cells.
The ?ow ?eld inside the syringe needle is well approximated by Poiseuille’s law (you can look it up
in the book), which can be worked out to give the following relation between the volume ?ow rate
Q and the wall shear stress t (the wall stress is the maximum stress):
Q =
1
32
pD3
µ
t
Here µ is the viscosity of the blood. Your task is to recommend to the administering doctor the
maximum permissible blood ?ow rate. Do your calculations in SI units, then convert your ?nal
answer to L/min (liters per minute, a unit that doctors understand...).
For the average human, how long will it take to replace their entire blood volume?
1

Related Discussions:- Need it fast

marginal rate of technical substitution?, Assume the production function f...

Assume the production function for a rm is given by the equation Q = L √K. Graph the isoquants corresponding to Q = 10, Q = 20, and Q = 50. Do these isoquants exhibit diminishing

Design flywheel and clutch, how to design of flywheel ,clutch and gearbox

how to design of flywheel ,clutch and gearbox

Different types of information units of cad, Different types of information...

Different types of information units of CAD There are different types of information units defined. They are : Class 0 The geometric primitives needed for describing 2- a

Heat loss in acylindrical pipe, Ask question #Minimum 1. Research the topic...

Ask question #Minimum 1. Research the topic of heat loss in a cylindrical pipe. Explain which laws of physics are used to discuss heat loss in a pipe, and briefly explain how the f

State about the caisson foundations, Caisson foundations Caisson founda...

Caisson foundations Caisson foundations are similar to wells, but are much large in size. They are of different types, closed end, open ended and of pneumatic type. Figure show

Explain the working of radial drilling machine, Normal 0 false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Working of clutch, Working of Clutch : The clutches are operated mechanica...

Working of Clutch : The clutches are operated mechanically through linkages. When operator presses the clutch lever, the pressure on the clutch plates reduces to zero, hence the c

Classification-plastics-reinforced plastics and adhesives, Classification ...

Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom

Determine the thermal efficiency of cupola, With the help of neat diagrams ...

With the help of neat diagrams explain various parts of Cupola. Define its operation. How the thermal efficiency of Cupola calculated? What do you mean by Die casting process? G

Cross belt drive, Cross Belt Drive: When shafts are rotating in the o...

Cross Belt Drive: When shafts are rotating in the opposite direction, cross belt drive can be obtained. Figure In the diagram given to us pulley 'A' is called as

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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