2. received no help on this programming assignment from anybody, and 3. given no

Question

2. received no help on this programming assignment from anybody, and 3. given no help in completing the programming assignment Question1 Hardness of materials is one of the most used material selection factors. Hardness is resistance and durability. One of the hardness tests is called the Brinell hardness pushed into the surface of the material, and a equated with wear test. In this case, a ball n optical measuring device is used to measure the diameter of the resulting indentation. The diameter of the ball and indentation, and the applied force is then used, calculate the Brinell hardness number (HB). where d, Kgf indentation D = diameter of indentor, mm d diameter of indentation, mm Specifications: Write a MATLAB worksheet where the values of L, D, and d, are placed in the beginnin of the MATLAB worksheet and then it computes and displays the Brinell Hardness. Use L-3000 kgf, D=10mm, d-7.2 mm. Question2 Multiply matrix A- 2 3 4; 5.267;89 1 ] by matrix B-[46;7851 1 Question3 Assign velocity of a body t 42 +In(2t) to a variable. Use the subs command to find the velocit Question4 Fualuate the integral from x-0 to xeInf.

Explanation / Answer

question 1
matlab code
L=3000;
D=10;
d=7.2;
HB=L/((3.14*D/2)*(D-sqrt(pow(D,2)-pow(d,2))));

question 2
matlab code
A={2 3 4 ; 5.2 6 7 ; 8 9 1};
B={4 6 ; 78 5 ; 1 1};
C=A*B;

question 3
matlab code
% velocity given by
subs(pow(t,2)+log(2*t),t,5)
% evaluates t^2+log(2t) by substituting "t" with "s"

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