Review the two videos (1) “Steam Power Plant” and (2) Gas Turbine. For each one, identify at least three examples of the design for each of the following criteria:

1. Energy performance (e.g. improved efficiency, higher power output, ...)

2. Economic considerations (reduced cost)

3. Environmental considerations (reduced emissions, etc.).

* Link of video 1 - https://youtu.be/xokHLFE96h8

Click on 1st video (how a thermal power plant works)

* Link of video 2 - https://youtu.be/GF-70yncAVY

Click on industrial gas turbine working principle

Uniform internal heat generation at  q˙⁢ = 2.00 × 10⁷ W/m³ is occurring in a cylindrical nuclear reactor fuel rod of 50-mm diameter, and under steady-state conditions the temperature distribution is of the form T(r)=a+br^2, where T is in degrees Celsius and r is in meters, while a= 800 °C and b= -4.167 × 10⁵ °C/m². The fuel rod properties are k= 30 W/m·K, ρ= 1100 kg/m³, and cp= 800 J/kg·K.

Find the steady state temperature gradient, d⁢T/d⁢r, at the outer surface of the rod, in °C/m.

What is the steady state rate of heat transfer at the outer surface, in W/m?

Immediately after the sudden increase in reactor power level (at t= 0 sec), what is the temperature at the centerline?

Immediately after the sudden increase in reactor power level (at t= 0 sec), what is the time rate of temperature change, d⁢T/d⁢t, at the centerline, in °C/s?

In one or two sentences describe the corrosion failure mode. What is one visual cue to indicate corrosion? Does corrosion always necessitate part replacement?

Say that you are looking to buy a small call and want to get a very efficient car. You are trying to decide between a hybrids car and an electric car. Hyundai offers the Ioniq in a hybrid gas and an all-electric model. Compare these models by filling in the table below.

Measure 2017 Ioniq blue 2017 Ioniq electric

MPG combined (epa)

MPG city (epa)

MPG highway (epa)

CO2 produced per mile (g/mi) in Columbia, Mo Fuel cost to drive 25mi ($)

Horse power (hp)

Torque (ft-lbf)

Range (mi)

Which would you buy and why?

1. A 150-kg sewing machine operates at 1200 RPM and has a rotating unbalance of 0.45 kg-m. What is the max stiffness of an undamped isolator such that the force transmitted to the machine’s foundation is less than:

a) 1547

b) 2547

2. Redesign helicopter seat (i.e. find new stiffness) so that the maximum velocity experienced by the pilot is 1 mm/sec.

use matlab:

A cable of length Lc supports a beam of length Lb so that it is horizontal when the weight W is attached to the beam end. The tension force T in the cable is given by the following equation: T=(Lb*Lc*W)/(D*sqrt(Lc^2-D^2)) Where D is the distance of the cable attachment point to the beam pivot. 1. Create a function M-file that evaluates the tension T as a function of D. In this function M-file the parameters Lb, Lc, and W should be declared global. 2. Create a script M-file that creates these global variables and: a) Prompts for and accepts the following values from the Command Window : W = 400N, Lb= 5 m, and Lc = 3 m (the weight is in Newtons, and the lengths are in meters) b) Uses these values and the fminbnd function to compute and display in the Command Window the value of D that minimizes the tension, T, and the minimum tension value. c) Uses fzero to determine by how much the value of D can vary from it

Find the value of the thermal conductiviity of the following substance at the given conditions:

AISI 316 Stainless Steel at 300K

What is the density of ice at 32°F and 1 atm?

What is the density of liquid water at 32°F and 1 atm?

As pressure increases the boiling temperature of water increases or decreases?

As pressure increases the freezing temperature of water increases or decreases?

How has the fact that water expands when it freezes shaped our world?

Work is a

a) point function

b) path function

c) depends on the state

d) none of the mentioned

1A. Which equilibrium phase on the Fe-Fe

phase diagram changes to Martensite when cooled quickly enough?

A. Austenite B. Ferrite C. Bainite D. Cementite

1B. For a tapered cross section metal bar that contracts when cooled, what is the stress status when the part is quenched to room temperatures (25 pts)?

A. The edge is in compression and the heavier section is in tension B. The edge is in tension and the heavier section is in compression C. No residual stresses will be built in the component

1C. A cylindrial carbon steel ingot is cooled from austenite temperatures to room temperatures, what is the stress status in the ingot (25 pts)?

A. The surface of the ingot is incompression and the center of theingot is in tension B. The surface of the ingot is in tension and the center is in compression C. No residual stresses will be built in the component

Technology that performs at the level of superhuman intelligence and beyond already exists. As Harris explained, even with a machine that performs at the level of humans or a group of researchers, it’ll still work exponentially faster than them. Harris says, describing a machine like that, that “in one week, it can perform 20,000 years of human-level intellectual work.” So of course, it’ll be convenient and amazing to have artificial intelligence find the cure to disease and find the answers to a question almost instantaneously compared to a group of researchers who may take months to do so, but when does AI reach the point where it’s so smart, that it’ll have no problem disregarding human’s lives to do what it wants to do?

Within the first two minutes of Sam Harris’ TED Talk on artificial intelligence, I was reminded of many of the episodes in Black Mirror where advanced technology in which we can currently only dream of becomes abused and causes chaos. Technology is constantly becoming more advanced, efficient, and intelligent. Undoubtedly, artificial intelligence will one day become so intelligent, it’ll have the ability to function independently of a human’s control. Without regulation, one day robot’s will start fixing all our economic issues and research questions. Human will be almost or basically useless and free to roam the earth doing whatever, just depending on robot’s to keep the world spinning. And what will stop robots from viewing us as “ants” and not hesitating to take us out if we are in their way? I agree that technology has brought us very far and I do think it should continue advancing whether it is to cure Alzheimers or just make our daily life more convenient, but when does AI become dangerously advanced? How do we decide when AI will threaten the human species? When do we decide to put a stop to it?

Please provide the answers in clear way

A company is planning to install a new automated plastic-molding press. Four different presses are available. The initial capital investments and annual expenses for these four different alternatives are:

Assume each press has the same output capacity of 150,000 units per year, has no salvage value at the end of its useful life, and the minimum attractive rate of return is 10%. The selling price for each plastic molded unit is $0.425 per unit.

a) Which press should you purchase if 150,000 nondefective units per year are produced by each press and all units can be sold?

b) Which press should you purchase is each press still produces 150,000 units per year, but the estimated unit reject rate is 7.4% for P1, 1.3% for P2, 2.6% for P3, and 4.6% for P4, where all nondefective units are sold but the defective units have no market value?

For the following, explain what each of them will do in MatLab by saying what the command does and what the result is. For example, if the command is >>x(2:end, 1:3) then your answer to this problem should be: This command retrieves the subset of x defined by rows 2 and 3 and columns 1-3. The result is a 2x3 matrix. Before you begin, run the command: x = [1 3 4 5 7; 5 6 10 9 11; 10 23 23 1 3];

a) x(:,5)

b) x(1,:)

c) x(2,3:4)

d) x(1:2,2:5)

e) length(x(1,:))

f) length(x(:,1))

g) sum(x(2,:))

h) mean(x(:,end))

i) max(x)

j) max(max(x))

k) round(3.75)

l) floor(3.75)

m) rem(150,100)

n) log(25)