Essential Environment: The Science Behind the Stories (6th Edition)
6th Edition
ISBN: 9780134714882
Author: Jay H. Withgott, Matthew Laposata
Publisher: PEARSON
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Chapter 14, Problem 8TYC
To determine
The largest two sources of greenhouse gas emissions in the United States and the ways that people can use to reduce these emissions.
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Problem 3
For the beam and loading shown, consider section n-n and determine (a) the largest
shearing stress in that section, (b) the shearing stress at point a.
1ft
15 kips 20 kips 15 kips
AITT
in
1
0.6 in.
-10 in.
1 in.
0.375 in.-
2 ft
2ft
2 ft 2ft
10 in.
1
0.6 in.
4.
An edge e can be (x) always full, (y) sometimes full,(z) never full; it can be (x') always crossing, (y') sometimes
crossing, (z') never crossing. So there are nine possible combinations: (xx') always full and always crossing,
(xy) always full and sometimes crossing, and so on. Or are there? Maybe some possibilities are impossible.
Let's draw a table:
The edge e is:
always full
sometimes full
never full
Possible
Possible
always crossing
f:2
or
or
S
e: 1
impossible?
impossible?
Possible
Possible
sometimes crossing
f:1
or
or
8
e: 1
impossible? impossible?
Possible
Possible
Possible
never crossing
or
or
or
impossible?
impossible?
impossible?
Take a piece of paper, complete the 3 × 3 table below by either finding an example illustrating that the
combination is possible or by concluding that it is impossible. To do so, you will need the Max Flow Min Cut
Theorem plus a bit of your own thinking. Once you have completed the table, select which of the following
statements are true: There is…
Structural analysis q
Chapter 14 Solutions
Essential Environment: The Science Behind the Stories (6th Edition)
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Similar questions
- In the figure, all loads are factored, and the uniform load includes self-weight. Use #3stirrups. fc′ = 4 ksi, and fy = 75 ksi.(a) What stirrup spacing is required at section A?(b) How will this spacing change at section B?(c) Indicate the region of the beam where stirrups are not required.arrow_forwarda) Calculate the values of v and i. + 803 1A Va 82 b) Determine the power dissipated in each resistor. 1A Va (a) + I 50 V 0.2 S (b) + D + 1 Α υ€ 20 Ω 50 V 250 ΩΣ ia (c) (d) Copyright ©2015 Pearson Education, All Rights Reservedarrow_forwardExercise 3-12: Find the Thévenin equivalent of the circuit to the left of terminals (a, b) in Fig. E3.12, and then determine the current I. 502 502 0.6 Ω 20 V | + <302 Ω ΣΙΩ b 2025 Ω 15A Figure E3.12arrow_forward
- 2. Consider following feedback system. r(t) e(t) y(t) K G(s) 1 where G(S) = s²+as+b In above, K, a and b are constants. Select the values of K, a and b in a way so that (i) (ii) (iii) the closed loop system is stable, steady-state error of the closed-loop system for step input is 0.2, the closed-loop response has 20% overshoot and 2 seconds as settling time.arrow_forward4. Answer the following questions. Take help from ChatGPT to answer these questions (if you need). But write the answers briefly using your own words with no more than two sentences, and make sure you check whether ChatGPT is giving you the appropriate answers in the context of class. a) What is the advantage of the PI controller over the proportional controller? b) What is the advantage of the PD controller over a proportional controller? c) In the presence of noise, what problem do we face implementing the derivate part of the PID (or PD) controller? To address this, what do we usually use? d) What are the forms of lead compensator and lag compensator? How do these two types of compensators differ?arrow_forwardFluid mechanics question Draw a free body diagram and properly explain each starrow_forward
- 3. Consider the following closed-loop system as shown in the figure. 16 Ge(s) s(s + 4) Suppose Ge(s) is a PID controller with Kp = 1, KD = 2 and K₁ = 3. a) Find the controller transfer function G₁(s). b) Find the open-loop transfer function. c) Find the closed-loop transfer function.arrow_forwardExercise 3-12: Find the Thévenin equivalent of the circuit to the left of terminals (a, b) in Fig. E3.12, and then determine the current I. 502 5 Ω 0.6 Ω a 3Ω ΣΙΩ b 20 V 1 + 2027 15A Figure E3.12arrow_forwardsolve and show workarrow_forward
- The box beam in the figure is reinforced with #4 U-stirrups in each web. f c′ = 3.5 ksi, andfy = 60 ksi.(a) What is the design shear capacity of the cross section?Hint: Find concrete and stirrup strengths separately, and then find the total capacity.(b) If the total applied factored shear force at the section is 220 kip, please comment onthe adequacy of this shear design.Hint: Compare the total capacity from (b) with the shear force.2. In the figure, all loads are factored, and the uniform load includes self-weight. Use #3stirrups. fc′ = 4 ksi, and fy = 75 ksi.(a) What stirrup spacing is required at section A?(b) How will this spacing change at section B?(c) Indicate the region of the beam where stirrups are not required.arrow_forwardStructural analysis questionarrow_forwardpractice problems want detailed break downarrow_forward
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