Numerade

Questions asked

BEST MATCH

Write the Lotka-Volterra growth equations (i.e., one for each species). Also indicate what each letter on the right side of the = sign represents

View Answer

BEST MATCH

Question 14 Which of the following is not used for evaluating a regression analysis? O Correspondence. O T-value. O Multicollinearity. O Standard error. O R-Squared. 0.5 pts

View Answer

BEST MATCH

(d) (1 point) There exists a linear-time deterministic algorithm for the Selection problem. Sol. True

View Answer

BEST MATCH

32. $\int_0^b 4x \, dx$, $b > 0$

View Answer

BEST MATCH

These are considered economic arguments for intervention: a. General Agreement on Trade in Services b. Non-agricultural goods c. The rise of dumping and anti-dumping policies d. None of the above

View Answer

BEST MATCH

Find a particular solution to y'' + 4y = 20 \sin(2t).

View Answer

BEST MATCH

What similarities dealing with parents teaching sexuality education and discipline to children could compare to each Vygotsky and Psychodynamic theories.

View Answer

BEST MATCH

3. Problem 3 A pharmaceutical company introduces a new medical capsule which is cylindrical and is filled with porous materials (see Figure below). The capsule is designed for oral administration and releases the active substance at a controlled rate. The core of the capsule is filled with an active compound. The compound undergoes a zero order chemical reaction to produce an active chemical which then diffuses through the porous medium to the cylindrical surface of the capsule. You may assume that the capsule is long enough so that you can ignore the mass transfer in the axial direction. The radius of the core is $R_1$ and the radius of the cylindrical capsule is $R_2$. 1. From first principles, set up the mass balance equation for the concentration distribution of the active chemical inside the capsule. You may assume that the diffusion coefficient of the active chemical in the porous solid is constant. 2. What are the boundary conditions for the mass balance equation? You may assume that the surroundings are well stirred and the active chemical is quickly absorbed by the gastric fluids. 3. Solve for the concentration distribution inside the capsule 4. Derive the release rate in terms of moles releases per unit time per unit capsule. What parameters can you vary to control the release rate of the active chemical?

View Answer

BEST MATCH

Optical isolators, however, are more typically built using an Faraday rotator, as shown in figure 2 Forward polarizer Faraday crystal 0° polarizer 45° 45° Pass 45° Block polarizer 90° Faraday crystal polarizer Backward Figure 2: a nice plot The Jones vector for a Faraday (polarization) rotator is given by, $J_F(\theta) = \begin{pmatrix} \cos^2 \theta & \sin \theta \cos \theta\\ \sin \theta \cos \theta & \sin^2 \theta \end{pmatrix}$ [2.1] Derive the Jones matrix for the system above and show that it can indeed act as an optical isolator. Determine whether it is possible to exchange the Faraday rotator with a quarter wave plate to create an optical polarizer.

View Answer

BEST MATCH

Let $A_n$ be an $n \times n$ matrix defined by $a_{ij} = \min\{i, j\}$. The following parts will lead us to prove that \\ $\det A_n = 1$, for any $n$. (a) Prove that if $n = 2$, then the above matrix has $\det A_2 = 1$. (b) Now suppose that $n = 3$. Subtract row 2 from row 3 in $A_3$ and compute the determinant along \\ the third row to show that $\det A_3 = 1$ (c) Suppose that you know that $\det A_{n-1} = 1$. Use a similar idea to the previous part to prove \\ that $\det A_n = 1$. The above three steps in fact prove that $\det A_n = 1$ for all $n$. This method of proofs is called proof \\ by induction.

View Answer

f-tima w.