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

Kelvin plank statement - thermodynamics, Kelvi n Plank Statement: ...

Kelvi n Plank Statement: Sol: It is impossible to construct this type of H.E. that operates on cyclic process and converts all the heat supplied to it into equivalent

Which three principal possible in radial drilling machine, Which three prin...

Which three principal possible in radial drilling machine Between them the plain drill machine, three principal movements are possible in this type of machine, by vertical move

Determine the heat rejection, In an engine working on Diesel cycle inlet pr...

In an engine working on Diesel cycle inlet pressure and tem are 1 bar and 17 o c respectively. Pressure at the end of adiabatic compression is 35 bar. He ratio of expansion i.e. af

What is erosion loss, Q. What is Erosion Loss? Additional metal thickne...

Q. What is Erosion Loss? Additional metal thickness must be added in specific locations where metal loss is expected, due to stream flow that is of high velocity, or is abrasiv

Newton law of cooling, Ask question Briefly explain how, using Newton’s L...

Ask question Briefly explain how, using Newton’s Law of cooling, you may write the temperature of a cooling body as an exponential function of time#Minimum 100 words accepted#

Control, hey i really need someone to help doing my control course work asa...

hey i really need someone to help doing my control course work asap cuse it is due sunday it is about Control of water level in a nonlinear ‘V’ shaped tank

Determine the acceleration of the body, Determine the acceleration of the b...

Determine the acceleration of the body: Two weights P and Q are associated by the arrangement shown in Figure. Neglecting friction and the inertia of the pulleys and cord, det

Thermal engineering, Air enters the compressor of an ideal air standard Bra...

Air enters the compressor of an ideal air standard Brayton cycle at 100kPa, 250C with a volumetric flow rate of 8m3/s and is compressed to 1000kPa. The temperature at the inlet to

Nitrogen storage and vaporizer, Q. Nitrogen storage and vaporizer? Bulk...

Q. Nitrogen storage and vaporizer? Bulk cryogenic storage of nitrogen must be located away from process equipment, preferably at the edge or corner of the process area where fi

What are the principles of location of drilling jig, a) Define the degree o...

a) Define the degree of freedom of a work piece in space. What are the basic principles of location of drilling jig.

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