REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
8th Edition
ISBN: 9781337370042
Author: TOMCZYK
Publisher: CENGAGE L
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Chapter 17, Problem 3RQ
Is the resistance in the start winding greater or less than the resistance in the run winding?
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Temperature (°C)
100
4. Consider the solidification of a binary Pb-10%Sn alloy. Assume that during solidification,
there is complete mixing in the liquid and no diffusion in the solid. Use the phase diagram
below to answer the following question.
(a)
Draw (on the phase diagram) the compositions of the liquid and the solid at the
interface as a function of temperature during solidification.
(b) Illustrate on the phase diagram how one would calculate the volume fraction solidified
at a given temperature.
(c)
(d)
Indicate the temperature at which solidification is complete.
Do you expect ẞ to be present in the as-cast microstructure? Explain
300
327°C
200
a
(Pb)
20
20
a + L
18.3
183°C
α + β
40
60
Composition (wt% Sn)
Liquid
600
500
232°C
B+L
400
B
61.9
97.8
300
808
100
(Sn)
200
100
Temperature (°F)
I tried this problem a couple of times and don't know where I'm going wrong can you help me out please
y(0)=1,
Using Laplace transforms solve the following differential
equations :
11) y"-4y+4y=0,
12) y+2y+2y=0,
y(0)=2.1,
y'(0) = 3.9
y'(0)=-3.
13) y+7y+12y=21e",
y(0)=3.5,
y'(0)=-10.
14) +9y=10e.
y(0)=0,
y'(0) = 0.
15) y+3y+2.25y=91³ +64,
y(0)=1,
y'(0) = 31.5
16) -6y+5y= 29 cos(21),
y(0)=3.2,
y'(0)=6.2
17) "+2y+2y=0,
y(0)=0,
y'(0)=1.
18) +2y+17y=0,
y(0)=0,
y'(0)=12.
19) y-4y+5y=0,
y(0)=1,
y'(0) = 2.
20) 9y-6y+y=0,
y(0)=3,
y'(0)=1.
21) -2y+10y=0,
y(0)=3,
y'(0)=3.
Chapter 17 Solutions
REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
Ch. 17 - The two popular operating voltages for residences...Ch. 17 - Prob. 2RQCh. 17 - Is the resistance in the start winding greater or...Ch. 17 - Which of the following devices may be wired into...Ch. 17 - Prob. 5RQCh. 17 - Define BEME.Ch. 17 - Why is the hermetic compressor motor manufactured...Ch. 17 - The two types of motors used for hermetic...Ch. 17 - How does power pass through the compressor shell...Ch. 17 - The two types of relays used to start hermetic...
Ch. 17 - A PTC device is used A. to start a hermetic...Ch. 17 - True or False: Three-phase motors have low...Ch. 17 - Prob. 13RQCh. 17 - Why is it desirable to have a two-speed...Ch. 17 - True or False: All electric motors must be cooled...Ch. 17 - True or False: An SCR is an electronic switch.Ch. 17 - Prob. 17RQCh. 17 - Capacitors are used after the converter to A....Ch. 17 - The converter A. changes the frequency of the...Ch. 17 - The inverter A. adjusts the frequency. B. adjusts...Ch. 17 - Briefly describe the operation of the three...
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