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

Bending equation, State and define the bending equation and mention it''s u...

State and define the bending equation and mention it''s units and derive it

Formulate stress analysis techniques, Formulate stress analysis techniques ...

Formulate stress analysis techniques relevant to a range of situations. The Brief A company has come and seek your advice on their draft design flat bridge. The bridge will

Burner management - discrete controls for steam generators, Q. Burner Manag...

Q. Burner Management - Discrete Controls for steam generators? The burner management system shall control the generator operation during pre-purge, light off, normal operation,

Theory of machine, analytical method for determining the acceleration and v...

analytical method for determining the acceleration and velocity?

Control system, hi i have an assignment in control system can u do it ?

hi i have an assignment in control system can u do it ?

Define the skid fabrication, Q. Define the skid fabrication? Unless not...

Q. Define the skid fabrication? Unless noted otherwise in this specification, skid fabrication shall be in accordance with GS-904-0510, GS-904-0511 and GS-904-0515. Dimensio

Cell covers--battery components , Cell Covers: Each cell is covered from ...

Cell Covers: Each cell is covered from the top of the cell covers and the terminals projected from the cell covers. The terminals are arranged alternatively in a line.

Determine wheel diameters at the pitch circle of blades, A pelton wheel wor...

A pelton wheel works at the foot of a dam because of which the head available at the nozzle is 220m. the nozzle diameter is 20 c.m. and coefficient of speed 0.98. The wheel operate

What is plain concrete footing, What is Plain Concrete Footing? Plain C...

What is Plain Concrete Footing? Plain Concrete Footing: Footings carrying relatively light loads are constructed with plain concrete. You have already seen a plain concrete

Objectives service and maintenance procedures , Objectives After study...

Objectives After studying this unit, you should be able to explain various procedures in service and maintenance, and appreciate the importance of the inspections

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