Lecture 24 - 1
Lecture 24 (12.8.5-12.8.6)
Last Time:
Humidification
This Time:
Evaporative Cooling
Adiabatic Mixing of Two moist Air Streams
If you have relatively dry and hot conditions (think Arizona) then you can use evaporative
cooling to cool the
Problem Set 20
Due: Wednesday 04/16/2014
(2 problems worth 20 homework points)
#1) One lbmol of octane gas (C8H18) reacts with the theoretical amount of air in a closed, rigid
tank. Initially, the reactants are at 77F, 1 atm. After complete combustion, th
MA 393
Final Exam Review/Checklist
Note: This list is not comprehensive! (I may have forgotten something. If you notice something
important missing from this list, email me ASAP.)
Some Helpful Hints
Be sure that you have gone through your notes. Work thro
MA 393
Test 3 Review/Checklist
Some Helpful Hints:
Be sure that you have gone through your notes. Work through the examples
we have done in class and make sure that you can work them on your own.
Go over the assigned homework problems. Even though I did
MA 393 review for Test 1: Chapters 1 3
*Note: This is not a comprehensive list!
Chapter 1
Be familiar with the different terms associated with data (data set, elements,
variable, sample, population, and sources of data). You do not need to write the
defin
MA 393 Probability and Statistics
Test 2 Review Checklist
Note: This list is not comprehensive; it is meant to serve as a guide.
Chapter 4: Continuous Distributions and the Normal Probability Distribution
KEY QUESTION: *What is the total area under a den
MAE-453 Mechanical Vibration
Solution to Problem 7.12:
Solution to Problem 7.19:
Read Section 9.1: Free Vibration and the Frequency Equation
Notes:
In Figure 9.1, when drawing the free body diagrams of the masses, the spring force in the middle
spring dep
MAE-453 Mechanical Vibration
Solution to Problem 2.11:
Read Section 2.4: Torsional Vibration
Notes:
In equation (2.14), the coefficient of is equal to the square of the natural angular frequency, n.
In equation (2.15), recall that the natural frequency in
MA 393 - Chapter 10.1: One-Factor Experiments
Factorial experiments involve several variables called factors and their effect on the response variable.
Key Question: Does varying the level of the factors produce a difference in the mean of the response
va
MA 393: Probability Practice
Subject is Pregnant
Subject is Not
Pregnant
Totals
Positive Test Result
(Pregnancy is
indicated)
80
Negative Test Result
(Pregnancy is not
indicated)
5
3
Totals
11
1. Fill in the marginal totals and use the table above to answ
MA 393 Notes: Chapter 1.1, 1.2, 1.3
Some Basic Terms and Ideas:
Data: collections of facts.
o
Quantitative data versus Qualitative data
o
Discrete versus continuous
Population
Sample
Variable
Univariate
Multivariate (also bivariate)
Statistics versus stat
MA 393 - Chapter 9.2: Two-Sample T-tests
Key Questions: Is there a difference between two means? If so, can we say that one mean is
greater than (or less than) the other?
EXAMPLE: A certain chemical reaction was run three times at each of three temperatur
Extra Credit Problem
Due: Friday 02/28/2014
(1 problems worth 30 homework points)
Problem Set #3 showed a very interesting result that was unexpected by myself and Dr. Batson.
For our problem, we saw that the thermal efficiency had a local maximum around
Exam 3 Review
Ground rules:
1) Exam is Wednesday 04/9/2014. The exam covers chapter 12 (PS #15-PS #18)
2) I will supply a new copy of the unit conversion sheet, the equation sheet, and any
applicable tables for your use at the time of the exam.
3) No elec
Exam 2 Review
Ground rules:
1) Exam is Wednesday 03/19/2014. The exam covers chapter 10 and compressible flow (PS
#6-PS #14)
2) I will supply a new copy of the unit conversion sheet, the equation sheet, and any
applicable tables for your use at the time o
Exam 1 Review
Ground rules:
1) Exam is Friday 02/07/2014. The exam covers chapter 9.1-9.11 (PS #1-PS #5)
2) I will supply a new copy of the unit conversion sheet, the equation sheet, and any
applicable tables for your use at the time of the exam.
3) No el
Problem Set 18
Due: Monday 04/07/2014
(3 problems worth 30 homework points)
#1) Moist air at 27C, 1 atm, and 50% relative humidity enters an evaporative cooling unit
operating at steady state consisting of heating section followed by a soaked pad evaporat
Problem Set 21
Due: Monday 04/21/2014
(2 problems worth 20 homework points)
#1) Ethane (C2H6) gas at 77F, 1 atm enters a well-insulated reactor operating at steady state and
burns completely with air entering at 240F, 1 atm. determine the temperature of t
Problem Set 19
Due: Monday 04/14/2014
(2 problems worth 20 homework points)
#1) Coal with the mass analysis 77.54% C, 4.28% H, 1.46% S, 7.72% O, 1.34% N, 7.66%
noncombustible ash burns completely with 120% of theoretical air. Determine
(a) the balanced re
Problem Set 16
Due: Friday 03/28/2014
(2 problems worth 20 homework points)
#1) Gaseous combustion products at 800F, 1 atm and a volumetric flow rate of 5 ft3/s enter a
counterflow heat exchanger operating at steady state and exit at 200F. The molar analy