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

P-n junction, what is p-n junction?

what is p-n junction?

Theorem of perpendicular axis, Theore m of perpendicular axis It state...

Theore m of perpendicular axis It states that if I X X and I Y Y   be the M.I. of plane section about the two mutually perpendicular axes meeting at a point. Th

Define heat for electrical resistance welding, Q. Define Heat for electrica...

Q. Define Heat for electrical resistance welding? The heat, H for electrical resistance welding is generated by passing a large electrical current ( of the order of 3000 to 100

MATLAB CODE FOR SOLVING HYBER REDUNDANT SNAKE ROBOT MOTIION, I need to have...

I need to have a matlab code with torque and force as differential constraint equations and tractrix constraint also included. The motion may be in a plane and with 5 or 6 links in

A, Application of cad

Application of cad

Working of telescopic hydraulic fork , Working of Telescopic Hydraulic Fork...

Working of Telescopic Hydraulic Fork:   When a road shock exerts on to the suspension system it is transmitted to the spring instead of motorcycle frame and the spring starts to o

Factor for selecting a digital encoder, What factors should be considered w...

What factors should be considered when selecting a digital encoder (line codes)? Briefly mention five of those factors. Use sketches and additional text to describe the following e

Writing of a welding procedure specification (wps), Writing of a Welding Pr...

Writing of a Welding Procedure specification (WPS ) A typical working procedure specification is written with all the factors of production in mind. Both experience and latest t

Strenght of material, how to calculate point of contraflexure in SFD and BM...

how to calculate point of contraflexure in SFD and BMD

proell governor, how to work proell govwrnor

how to work proell govwrnor?

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