Luisa

Independent Researcher

Active since 2025

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MATLAB
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Problem

Slicing a 4-pointed star polygon
Given the area, A, of a 4-pointed star polygon formed by the rectangle, with dimensions L×2L, and four triangles, with height h ...

2 days ago | 0 | 3 solvers

Solved

Find R*Rp-N*Np=1 given gcd(R,N)=1

5 days ago

Solved

Rule of mixtures (composites) - reverse engineering
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

6 days ago

Solved

Rule of mixtures (composites) - other bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

6 days ago

Solved

Rule of mixtures (composites) - weighted bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

6 days ago

Solved

Rule of mixtures (composites) - lower and upper bounds (volumes)
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

6 days ago

Solved

Rule of mixtures (composites) - either bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

6 days ago

Solved

Rule of mixtures (composites) - lower and upper bounds
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

7 days ago

Solved

Rule of mixtures (composites) - upper bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

7 days ago

Solved

Rule of mixtures (composites) - lower bound
The <http://en.wikipedia.org/wiki/Rule_of_mixtures rule of mixtures> is used in the mechanical design of composite structures to...

7 days ago

Problem

Covering a 4-pointed star polygon by a circle sector
Given the area, A, of a 4-pointed star polygon formed by the rectangle, with dimensions L×2L, and four triangles, with height h ...

7 days ago | 0 | 4 solvers

Solved

Raise a polynomial to a power
In Matlab, polynomials are represented by a vector of coefficients. For example, the polynomial p=a*x^2 + b*x + c is represente...

7 days ago

Solved

Determine whether a given point is inside or outside a polygon
A closed polygon may be described by an N x 2 array of nodes, where the last node and the first node are the same. Each row of t...

7 days ago

Solved

Compute the head for steady 1D flow in a homogeneous aquifer
Problem statement Write a function that computes the head (i.e., piezometric head for a confined aquifer or water table elevat...

8 days ago

Solved

Stress-Strain Properties - 8
Up to this point, you've calculated some material properties based on tensile stress-strain data. For this problem, you are task...

8 days ago

Solved

Measure the hydraulic conductivity with a constant-head permeameter
A constant-head permeameter is a device for measuring the hydraulic conductivity of a soil sample. In this problem the sample i...

9 days ago

Solved

Stress-Strain Properties - 7
The toughness of a material is technically defined as the plastic strain energy absorbed by the material (the plastic region in ...

10 days ago

Solved

Stress-Strain Properties - 6
The total energy absorbed by a material up to failure in a tensile test is termed the absorbed strain energy. With respect to th...

10 days ago

Solved

Stress-Strain Properties - 5
Similar to the previous problem, materials may be characterized by their stiffness-to-weight ratio, which is the elastic modulus...

10 days ago

Solved

Stress-Strain Properties - 4
A common measure of the ability of a material to carry load per unit mass is termed strength-to-weight ratio and is calculated b...

10 days ago

Solved

Stress-Strain Properties - 3
A brittle material will not exhibit a yield point. In other words, the yield point and failure point coincide. In such cases, th...

10 days ago

Solved

Stress-Strain Properties - 2
The resilience of a material is its ability to resist permanent (or plastic) deformation. The resilience coincides with the elas...

10 days ago

Solved

Stress-Strain Properties - 1
This is the first in a series of problems regarding mechanics of materials, in particular, material properties drawn from stress...

10 days ago

Problem

Covering a four-pointed star polygon by circles
Given the area, A, of a star polygon formed by the rectangle, with dimensions L×2L, and four triangles, with height h from their...

10 days ago | 0 | 4 solvers

Question

Reference Solution in 'Create Problem'
In 'Create Problem' page, there is the section 'Reference Solution', which refers to 'Optionally enter a solution to check again...

11 days ago | 1 answer | 0

1

answer

Problem

Covering a four-pointed star polygon by rectangles
Given the area, A, of a star polygon formed by the rectangle, with dimensions L×2L, and four triangles, with height h from their...

12 days ago | 0 | 5 solvers

Solved

Slicing the area of a circle
Given the area, A, of a square, consider a circle having the area, πA, and the radius, r. For a given slicing number n>1, find ...

13 days ago

Problem

Slicing the area of a circle
Given the area, A, of a square, consider a circle having the area, πA, and the radius, r. For a given slicing number n>1, find ...

19 days ago | 0 | 3 solvers

Question

Community Preferred Solutions in Cody
Everytime I vote for one preferred solution, Community Preferred Solutions marks the two options as preferred. Is possible that...

19 days ago | 1 answer | 0

1

answer

Solved

Height of a four-pointed star polygon
Given the area A, of a rectangle with dimensions l1xl2, where the side lengths are integers and form the smallest possible perim...

19 days ago