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)

Fourier Series Approximation Matlab HW1:
   

You are given a finite step function  
x(t)=-1, 0<t<4
         1, 4<t<8 .

Hand calculate the FS coefficients of x(t) by assuming half- range expansion,  for each case below and modify the code.

Approximate x(t) by cosine series only (This is even-half range expansion). Modify the below code and plot the approximation showing its steps changing by included number of FS terms in the approximation.

Approximate x(t) by sine series only (This is odd-half range expansion).. Modify the below code and plot the approximation showing its steps changing by included number of FS terms in the approximation.

You are given a code below which belongs to a different function, if you run this code it works and you will see it belongs to ft=1 0<t<2 0 2<t<4 . In this code f(t) is only approximated by even coefficients (cosine series).
Upload to BB learn using the Matlab HW1 link:
A multi page pdf file that shows

The hand calculations of FS coefficients

The original function plotted

The approximated functions plotted for b and c.

A Comment on how FS expansion approximates discontinuities in the function.

MATLAB CODE
_____________________________________________________________________________________________________________________________________________________________________
clear all
close all
% Example MATLAB M-file that plots a Fourier series
% Set up some input values
P = 4; %period = 2P
num_terms = 100; %approximate infinite series with finite number of terms
% Miscellaneous setup stuff
format compact;  % Gets rid of extra lines in output. Optional.
% Initialize x-axis values from -1.25L to 1.25L. Middle number is step size. Make
% middle number smaller for smoother plots
t = -4:0.001:4;
x=zeros(length(t),1);   % reseting original half range expanded function array
x(0<=t & t<2)=1;       % forming the original half range expanded function array for the purpose of plotting only
x(2<t & t <4)=0;
x(t<0 & -2<t)=1;
x(t<-2 & t>-4)=0;
figure     %plotting original half range expanded function
plot(t,x)
axis([-4.5 4.5 -0.5 1.5])
%Starting to approximate f(t)
% Initialize y-axis values.  y = f(t)
f = zeros(size(x'));
% Add a0/2 to series
a0 = 1;
f = f + a0/2;
% Loop num_terms times through Fourier series, accumulating in f.
figure
for n = 1:num_terms
   
 
   
   % Formula for an.
   an = (2/(n*pi))*sin(n*pi/2);
       bn=0;
   
   % Add cosine and sine into f
   f = f + an*cos(n*pi*t/P) + bn*sin(n*pi*t/P);
   
   % Plot intermediate f.  You can comment these three lines out for faster
   % execution speed.  The function pause(n) will pause for about n
   % seconds.  You can raise or lower for faster plots.
   plot(t,f);
   set(gca,'FontSize',16);
   title(['Number of terms = ',num2str(n)]);
   grid on;
   if n < 5
       pause(0.15);
   else
       pause(0.1);
   end
   xlabel('even approx');
end;

A single thread power screw is 36 mm in diameter with a pitch of 6 mm. A vertical load on the screw imposes a force of 9 kN. The coefficients of friction are 0.09 for the collar and 0.16 for the screw. The effective diameter of the collar is 52 mm. Find the overall efficiency and torque required to raise and lower this load.

Hi, I'm currently writing a Matlab program to simulate the Apollo 11 trajectory. Now I want to plot a 3D animated orbit which is a 60 by 58 nautical miles orbit. Can you provide a code or some idea of how to plot an orbit like this in 3D?

Provide two good reasons machine age thinking doesn’t work well for systems of any appreciable complexity

Why are good systems operational requirements and a maintenance & support concept important?

Determine the phase description of each the following substances. You may choose 1) "Subcooled or compressed liquid", 2) "Saturated fluid or saturated mixture", 3) Superheated vapor or superheated gas. a) Water 101kPa & 25°C     b) Water 101kPa & 100°C c) Water 20kPa & 70°C       d) Water 500kPa & 1300°C e) Water 10kPa & 340°C    f) Water 10kPa & 30°C g) Water 1600kPa & 180°C   h) Water 17.5MPa & 330°C i)  Ammonia  100kPa & -25°C   j) Ammonia   350kPa & 0°C k) R134a   3000kPa & -20°C

the sources of energy loss contained in fluid power system can include

Use Laplace transformations to solve the following differential equations:

dy(t)/dt + a y(t) = b; I.C.s y(0) = c

d2y(t)/dt2 + 6 dy(t)/dt + 9 y(t) = 0; I.C.s y(0) = 2, dy(0)/dt = 1

d2y(t)/dt2 + 4 dy(t)/dt + 8 y(t) = 0; I.C.s y(0) = 2, dy(0)/dt = 1

d2y(t)/dt2 + 2 dy(t)/dt + y(t) = 3e-2t; I.C.s y(0) = 1, dy(0)/dt = 1