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michael andrade

michael a.

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1. Which of the following best explains why her first objective is flawed. A. Parenchyma cells are not found in plants. B. Parenchyma cells do not have lignin and are weaker compared to sclerenchyma cells. C. Rice cannot grow more than 6 feet tall. D. Genes do not determine the structure of a cell.

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A medical resident mistakenly orders a saline IV with a concentration of 0.19 %m/v, but you recall that the usual concentration of “normal” saline IV is 0.91%m/v. Normal saline is isotonic with cells. Label the solution as hypertonic, or hypotonic, and describe the net flow of water into or out of the cell. hypertonic, net water flow in hypertonic, net water flow out hypotonic, net water flow in hypotonic, net water flow out

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1 k? I M 5V + V a) Solve for $I$ and $V$ using the load line analysis method, assuming a Si diode with $I_S = 10^{-15}$ A. b) Now solve for $I$ and $V$ using the large-signal model of the diode, with $V_{Don} = 0.7V$. Compare these values of $I$ and $V$ against the ones which you obtained in part (a). c) Suppose the silicon diode is replaced with an AlGaAs light-emitting diode. How would you expect $I$ and $V$ to change, qualitatively? Explain. (Hint: Recall that the energy of the emitted photons $E = hv = hc/\lambda$ corresponds to the energy given up by a conduction electron when it recombines with a hole, and therefore corresponds to the energy required to generate an electron-hole pair. Recall that the energy required to generate an electron-hole pair in Si is 1.1 eV, which corresponds to wavelength $\lambda = 1\mu m$.)

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Jill purchased a $30,000 camper by putting 15% down and taking out a loan for the rest. She will be paying 4 and 3/8% APR and making equal payments every month for 5 years to pay it off. How much are her monthly payments? ______________

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Consider the magnetic system in Figure 1. Figure 1 When x = 0, there's no airgap between two parts of this system. The area of cross-section is $\frac{1}{16} m^2$. Assume x = 3t where t is the time. The total length of the whole iron magnetic loop (excluding airgap) is 9 m. Given $\mu_r = 3000$, $\mu_0 = 4\pi \times 10^{-7} H/m$, and number of turns N = 20. Answer the following questions: (i) Calculate the reluctance the magnetizing path as a function of t. (ii) Determine the magnetizing flux and the magnetizing inductance as a function of t. (iii) For i = 20A, compute the flux linkage as a function of t. Neglect the leakage flux. (iv) Based on Part (iii), for the resistance r = 50, calculate (a) voltage across the winding, and (b) voltage 'v' across the terminals (both as a function of t). (v) What are 3 ways to increase the flux linkage of this system.

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Create a program to create derivatives. (C++) This project must use two classes: 1. Linked List class 2. Node class Node class: Variables: - Outer coefficient - Inner coefficient - Exponent - Trig identifier - Node pointer Functions: - Default constructor - Overloaded constructor - Accessors and mutators - Overloaded << operator (Display a single node in the same format as input) Input format: - All nodes will be dynamically created. - There should only be enough nodes to hold data for the current expression. - You will have to consider a way to reuse the linked list for the next expression. - All input will be read from a file. - Each term in the expression will be stored into a node and added into the linked list. - Each line in the file will be a mathematical function that can be derived. - The number of lines in the file is unknown. - Each calculated derivative will be written to a file. User Interface: - There will be no user interface for this program. Input: - All input will be read from a file named "functions.txt". - Each line in the file will be a mathematical function with the following parameters: - Consist of polynomial terms - the highest degree will be 10. - May also contain trig functions. - Exponents will be represented by the "^" character. - Exponents may be positive or negative. - Do not assume that the expression will be in order from highest to lowest exponent. - All coefficients will be integers. - The absence of a coefficient should be interpreted as a coefficient of 1. - Trigonometric functions may have coefficients. - The variable will always be 'x'. - There will be spaces around the operators between terms. - If a trig function is used, there will be a space between the trig function and the coefficient of x.

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Assume p̄ = 0.6 in a sample of size n = 50. a. Construct the 95% confidence interval for the population proportion. b. What happens to the margin of error if the above sample proportion is based on n = 200 instead of n = 50?

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Develop a Python program to do the following: Input any number of positive and negative integers from the user, then display the number of integers that were positive and the number of integers that were negative. Requirements: - You must write two functions, is_positive and is_negative, that return True or False if the integer handed to them is positive or negative, respectively. - You must call your functions in your overall loop in your main code. Example output: Please enter a positive or negative integer, or 0 to quit: 3 Please enter a positive or negative integer, or 0 to quit: 5 Please enter a positive or negative integer, or 0 to quit: -3 Please enter a positive or negative integer, or 0 to quit: 9 Please enter a positive or negative integer, or 0 to quit: 0 You entered 3 positive integers and 1 negative integer(s). Add comments to your program starting with your name at the top, then throughout your program to describe what you are doing. Be sure and make your calculations clear, giving your variables meaningful names. Also, be sure to indent consistently throughout your program to make it more readable. Be sure you run this and test it a few times before submitting it.

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y = x^2" is the equation of the sketched curve in the diagram. This curve cuts the x-axis twice, at points B and C. The curve cuts the y-axis (which is not being shown) only once, at point A. 74i) What are the coordinates of point A?

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Then enter the new coordinates. C (5,2) B(6,1) A (8,4) A'([?], []) B'([], []) C'([],[]) < -6, 1 > Enter

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