M3A1
Jennifer Burns
Excelsior College
Flowchart for Accounting Data Flows
Cash accounting
Purchase Merchandise
Accrual Accounting
Record transaction
Credit accounts payable/Debit
inventory
Update Balance sheet to show
inventory debit and accounts
payable
THOMAS EDISON STATE UNIVERSITY
COURSE TITLE: ENGLISH COMPOSITION I
SUB TITLE: WAYS OF KNOWING
STUDENT NAME: DENNESHA TATE
INSTRUCTOR: PROFESSOR CHLOE MILLER
DATE: JULY 02, 2016
DEGREE NAME: ASSOCIATE OF SCIENCE IN BUSINESS ADMINISTRATION
1
My chosen topic
326
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
to HG2 D 78.5 kJ/kg is 300 K. From Fig. 13.5 the exit air therefore has a humidity of
0.02 kg/kg which from Fig. 13.4 corresponds to a percentage humidity of 90%.
PROBLEM 13.9
Water is to be cooled in a small pa
MOMENTUM, HEAT AND MASS TRANSFER
313
the surface. Obtain the relation between uC and y C in the laminar sub-layer. Outside the
laminar sub-layer, the relation takes the form:
uC D 2.5 ln y C C 5.5
At what value of y C does the transition from the laminar
319
HUMIDIFICATION AND WATER COOLING
1 kmol of vapour occupies 22.4 m3 at STP,
and:
volume of water removed D 3.933 104 22.4 D 0.00881 m3 /s
Assuming no volume change on mixing, the gas flow after drying
D 0.60 0.00881 D 0.591 m3 /s at STP .
PROBLEM 13.3
MOMENTUM, HEAT AND MASS TRANSFER
315
viscosity E are equal, calculate the value of the temperature gradient in a liquid flowing
over the surface at y C D 15 (which lies within the buffer layer) for a surface heat flux
of 1000 W/m2 . The liquid has a Prand
311
MOMENTUM, HEAT AND MASS TRANSFER
Solution
The Universal Velocity Profile is discussed in detail in Section 12.4, and in the region
where eddy transport dominates (y C > 30) and making all the stated assumptions:
uC D 2.5 ln y C C 5.5
(equation 12.37)
306
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
PROBLEM 12.13
Obtain the TaylorPrandtl modification of the Reynolds analogy between momentum
and heat transfer and give the corresponding analogy for mass transfer. For a particular
system a mass transfer coeffi
307
MOMENTUM, HEAT AND MASS TRANSFER
as fully developed. The ratio of the velocity at the edge of the laminar sub-layer to the
mean velocity of flow may be taken as 2 Re0.125 , where Re is the Reynolds number in
the pipeline.
If the tube walls are at an a
295
THE BOUNDARY LAYER
D
y
2
cos
2
us2
l
1
2
0
1
1 cos
0
y y
d
l
2
1
1
y
C
sin
2
0
1
2
D us2
D 0.1366us2 .
2
dux
y
D us
cos
dy
2
2
u
dux
s
D
dy yD0
2
us
dux
R0 D
D
.
dy yD0
2
D us2
Differentiating:
and:
Thus:
us
0.1366us2 D
x
2
312
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
may be written as:
hD [1 1 Sc] D h/Cp [1 1 Pr] (equation 12.121) (i)
The Schmidt group, Sc D /D D 1 103 /1000 5 109 D 200
The Prandtl group, Pr D Cp /k D 4 103 1 103 /0.6 D 6.67
and:
h/Cp D 4000/4 103 1000 D 0.0
SECTION 12
Momentum, Heat and Mass Transfer
PROBLEM 12.1
If the temperature rise per metre length along a pipe carrying air at 12.2 m/s is 66 deg K,
what will be the corresponding pressure drop for a pipe temperature of 420 K and an air
temperature of 310
HUMIDIFICATION AND WATER COOLING
321
Solution
The feed rate of wet nitrate is 1.5 kg/s containing 5.0% moisture or 1.5 5/100 D
0.075 kg/s water.
flow of dry solids D 1.5 0.075 D 1.425 kg/s
If the product contains w kg/s water, then:
w/w C 1.425 D 0.2/100
Quiz #1 Study
1. Classify the variable in the following example as qualitative or quantitative. If the
variable is quantitative, state whether it is discrete or continuous.
Species of trees sold at a nursery.
Answer: This statement is qualitative data bec
What kind of account is Unearned Revenue?
Liability account
The paid-in capital portion of stockholders' equity does not include
Retained Earnings.
A company purchased 100 shares of its common stock at $ 49 per share. It then sells
75 of the treasury shar
308
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
PROBLEM 12.16
Explain the importance of the universal velocity profile and derive the relation between
the dimensionless derivative of velocity uC , and the dimensionless derivative of distance
from the surface
330
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
At 295 K: Enthalpy of moist air D 0.0884 0.995295 273 C 0.017 0.0884
[4.18295 273 C 2445] D 5.75 kW
At 285 K: Enthalpy of moist air D 0.0884 0.995285 273 C 0.009 0.0884
[4.18285 273 C 2468] D 3.06 kW
At 275 K:
MOMENTUM, HEAT AND MASS TRANSFER
317
If the shear stress at the surface is R0 , the shearing force over area A is the rate of
change of momentum or:
mus /t D R0 A and Cp 0s /us D q/R0
Writing R0 D R, the shear stress acting on the walls and h as the heat
MOMENTUM, HEAT AND MASS TRANSFER
301
PROBLEM 12.6
Obtain an expression for the simple Reynolds analogy between heat transfer and friction.
Indicate the assumptions which are made in the derivation and the conditions under which
you would expect the relati
324
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
PROBLEM 13.8
Water is to be cooled in a packed tower from 330 to 295 K by means of air flowing
countercurrently. The liquid flows at the rate of 275 cm3 /m2 s and the air at 0.7 m3 /m2 s.
The entering air has a
HUMIDIFICATION AND WATER COOLING
331
The latent heat of water at 275 K is 2490 kJ/kg and, taking the specific heat of water
vapour as 2.01 kJ/kg K, the enthalpy of the water vapour is:
28.18 0.06444.18275 273 C 2490 C 2.01300 275 D 4625 kJ
Hence the total
322
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
Water entering with the air D 6.10 0.007 D 0.0427 kg/s.
Water evaporated D 0.07215 kg/s.
Water leaving with the air D 0.0427 C 0.07215 D 0.1149 kg/s
Humidity of outlet air D 0.1149/6.10 D 0.0188 kg/kg dry air.
P
304
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
PROBLEM 12.9
Calculate the rise in temperature of water flowing at 4 m/s through a smooth 25 mm
diameter pipe 6 m long. The water enters at 300 K and the temperature of the wall of the
tube can be taken as appro
329
HUMIDIFICATION AND WATER COOLING
(c) the temperature to which the inlet air would have to be raised to carry out the
drying in a single stage.
Solution
See Volume 1, Example 13.4
PROBLEM 13.11
0.08 m3 /s of air at 305 K and 60% humidity is to be coole
310
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
Solution
The derivation of the TaylorPrandtl modification of the Reynolds analogy between heat
and momentum transfer is presented in Section 12.8.3 and the result is summarised as:
St D h/Cp us D R/us2 /[1 C Pr
SECTION 13
Humidification and Water Cooling
PROBLEM 13.1
In a process in which benzene is used as a solvent, it is evaporated into dry nitrogen.
The resulting mixture at a temperature of 297 K and a pressure of 101.3 kN/m2 has a
relative humidity of 60%.
HUMIDIFICATION AND WATER COOLING
327
350
Enthalpy (HG kJ/kg)
300
250
200
150
(qL2'HG2)
100
50
(qL1'HG1)
0 280 290 300 310 320 330
Temperature (q K )
Figure 13b.
bulb temperature. From Fig. 13.4, at 295 K and 60% humidity, the wet-bulb temperature
of the i
316
CHEMICAL ENGINEERING VOLUME 1 SOLUTIONS
and:
Hence:
C
du
u
CE
u D
dy C /u
C
du
5
D
D
CE
CE
C
dy
yC
2
When y C D 15, then: / D / C E/3
and:
E D 2/
iii) For heat transfer in buffer zone: q D k C Cp EH
dT
dy
dT
dy
When y C D 15, then putting E D 2/ gi
M5A1: PROJECT STOCK VALUATION
PRINCIPLES OF FINANCE
MARCH 11, 2015
2
PROJECT STOCK VALUATION
Booz Allen Hamilton Holding Corporation (NYSE: BAH) is one of the leading consulting firms
in our country. BAH offers management and technology consulting service
v. Fill the gaps with the correct words.
_._._._
appearances basis cakes case deadline
emphasis fingers hand harm history
length manner thread words world
W
1. It was Neil Armstrong who went down in . as the first man to have
stepped on the surface of the
7. Angie suspects this man of stealing her watch.
Angie has .
8. There hasn't been such a scandal in our school before.
. .
lhlS IS .
.
9. Isn't it high time you greased the hinges? (need)
. 17
10. I'm not certain, but there may be about twenty applicatio
w
l. Replace each italicized word with a synonymous one.
The anxiety of many investigators has again been aroused (1) by reports of the
Abominable (2) Snowman which was encountered somewhere in the Himalaya region by
an expedition of mountaineers aspiring
7. Adam Collins was notorious tor making up the most unusual stories about his own
life. By these means, he also succeeded in promoting himself to the top.
.
9. There's much to your advantage if you can rely on your rich parents taking care of you
all the