silvershark149

<p>Question: On October 9, 1992, a 27-pound meterorite struck a car in Peekskill, NY, leaving a dent 22cm deep in the trunk. If the meterorite struck the car with a speed of 130m/s, what was the magnitude of its deceleration, assuming it to be constant?</p>

There are 100 bunnies living on an island on November 7, 2006. The net birth rate is 1.2 baby bunnies/ bunny-year, 0.85 bunnies/bunny-year go to bunny heaven annually. Numerous bunny tourists decide to stay on the island—so that the net immigration rate is 0.45 bunnies/bunny-year, and 0.12 bunnies/ bunny-year leave for better-tasting alfalfa. How many bunnies are there on November 6, 2007? How many bunnies are there on the island on November 6, 2016? Use the Human Population Dynamic Model. State any assumptions inherent in this model.

Which action would be considered an instance plagiarism (apex)

Construct finite automata for the given regular expressions                                                    

1. (ab+a + ab) * + ((a + bba*) + ba+b) *) *+ ((aa)* + bb*)

For this assignment you are required to implement one of the following algorithms, depending the result of your registration # mod 3, which is 0:

If the result is 0, you will have to implement both the recursive and bottom up version of matrix multiplication algorithm.

You also have to test your implementation and note down their running times for random input of size
100
10000
1000000
100000000
The code to test your code should also be uploaded

Q1. Write four different C statements that each add 1 to integer variable x.

With the circuit switched network shown below, there are 4 links between each switch using frequency division multiplexing (FDM). If there are already 2 active connections between switches B and C, how many users can connect from switch A to C? What happens if an additional user wants to connect from A to C? Would it be different if we used time division multiplexing (TDM)?

a.A sinewave has a period (duration of one cycle) of 645 μs. What is the corresponding frequency of this sinewave, in kHz, expressed to 3 significant figures? (See Study Note 7.1 in the ‘Using Numbers (maths)’ booklet.)

A (i) If the frequency of the sinewave is now reduced by a factor of 3.5, what will be the new period value? Express your answer in ms, to 3 significant figures.

Note: In the second part of this question, to avoid rounding errors in your calculations, use the full frequency value from the first part, not the rounded value to 3 significant figures.

Explain the operation of the Agent Architecture Model based on the following:

a. Potentiality
b. Upgrade
c. Sociability
d. Individuality
e. Perception
f. Action

Report examples of five systems where Hybrid operating system is required. Also justify the
requirement of hybrid operating system for these five systems.

Draw an initial ER diagram for the following scenario:

Anglo Coal RSA is creating a database to keep track of all the employees in the company. Each employee's name, surname, contact information and employees start date needs to be kept. There are different positions at Anglo Coal that indicate a different salary, medical aid and if you qualify for danger pay. There are different departments over the country. Anglo would like to know who works in what department and where that department is. 

1.Write a function encipher(s, n) that takes as inputs an arbitrary string s and a non-negative integer n between 0 and 25, and that returns a new string in which the letters in s have been "rotated" by n characters forward in the alphabet, wrapping around as needed. For example:

>>> encipher('hello', 1) result: 'ifmmp'

>>> encipher('hello', 2) result: 'jgnnq'

>>> encipher('hello', 4) result: 'lipps'

Upper-case letters should be "rotated" to upper-case letters, even if you need to wrap around. For example:

>>> encipher('XYZ', 3)

result: 'ABC'

Lower-case letters should be "rotated" to lower-case letters:

>>> encipher('xyz', 3)

result: 'abc'

Non-alphabetic characters should be left unchanged:

>>> encipher('#caesar!', 2)

result: '#ecguct!'

Hints/reminders:

You can use the built-in functions ord and chr convert from single-character strings to integers and back:

>>> ord('a')

result: 97

>>> chr(97)

result: 'a'

You can use the following test to determine if a character is between 'a' and 'z' in the alphabet:

if 'a' <= c <= 'z':

A similar test will work for upper-case letters.

We recommend writing a helper function rot(c, n) that rotates a single character c forward by n spots in the alphabet. We have given you a template for this helper function in ps3pr3.py that checks to ensure that c is a single-character string. We wrote rot13(c) in lecture; rot(c, n) will be very close to rot13(c)! You can test your rot(c, n) as follows:

>>> rot('a', 1)

result: 'b'

>>> rot('y', 2)

result: 'a'

>>> rot('A', 3)

result: 'D'

>>> rot('Y', 3)

result: 'B'

>>> rot('!', 4)

result: '!'

Once you have rot(c, n), you can write a recursive encipher function.

Once you think you have everything working, here are three more examples to try:

>>> encipher('xyza', 1)

result: 'yzab'

>>> encipher('Z A', 2)

result: 'B C'

>>> encipher('Caesar cipher? I prefer Caesar salad.', 25)

result: 'Bzdrzq bhogdq? H oqdedq Bzdrzq rzkzc.'

2.Write a function decipher(s) that takes as input an arbitrary string s that has already been enciphered by having its characters "rotated" by some amount (possibly 0). decipher should return, to the best of its ability, the original English string, which will be some rotation (possibly 0) of the input string s. For example:

>>> decipher('Bzdrzq bhogdq? H oqdedq Bzdrzq rzkzc.')

result: 'Caesar cipher? I prefer Caesar salad.'

Here are two more examples:

>>> decipher('Hu lkbjhapvu pz doha ylthpuz hmaly dl mvynla lclyfaopun dl ohcl slhyulk.')

result: 'An education is what remains after we forget everything we have learned.'

>>> decipher('python')

result: 'eniwdc'

------------------------------------

def rot(c, n):
    """ your docstring goes here """
    # check to ensure that c is a single character
    assert(type(c) == str and len(c) == 1)

def letter_prob(c):
    """ if c is the space character (' ') or an alphabetic character,
        returns c's monogram probability (for English);
        returns 1.0 for any other character.
        adapted from:
       
    """
    # check to ensure that c is a single character   
    assert(type(c) == str and len(c) == 1)

    if c == ' ': return 0.1904
    if c == 'e' or c == 'E': return 0.1017
    if c == 't' or c == 'T': return 0.0737
    if c == 'a' or c == 'A': return 0.0661
    if c == 'o' or c == 'O': return 0.0610
    if c == 'i' or c == 'I': return 0.0562
    if c == 'n' or c == 'N': return 0.0557
    if c == 'h' or c == 'H': return 0.0542
    if c == 's' or c == 'S': return 0.0508
    if c == 'r' or c == 'R': return 0.0458
    if c == 'd' or c == 'D': return 0.0369
    if c == 'l' or c == 'L': return 0.0325
    if c == 'u' or c == 'U': return 0.0228
    if c == 'm' or c == 'M': return 0.0205
    if c == 'c' or c == 'C': return 0.0192
    if c == 'w' or c == 'W': return 0.0190
    if c == 'f' or c == 'F': return 0.0175
    if c == 'y' or c == 'Y': return 0.0165
    if c == 'g' or c == 'G': return 0.0161
    if c == 'p' or c == 'P': return 0.0131
    if c == 'b' or c == 'B': return 0.0115
    if c == 'v' or c == 'V': return 0.0088
    if c == 'k' or c == 'K': return 0.0066
    if c == 'x' or c == 'X': return 0.0014
    if c == 'j' or c == 'J': return 0.0008
    if c == 'q' or c == 'Q': return 0.0008
    if c == 'z' or c == 'Z': return 0.0005
    return 1.0

Malcolm Company’s bonds have 5 years remaining to maturity.  Interest is paid quarterly; the bonds have a $1,000 par value; and the coupon interest rate is12%.   Would you pay $950 for one of these bonds if you thought that the appropriate rate of interest was 14%?

48 A hospital is concerned about the risk of patients contracting an infection after a one-week or longer stay in the hospital. A long-term study estimates that the chance of contracting an infection after a one-week or longer stay in a hospital is 10%. A random sample of 50 patients who have been in the hospital at least 1 week is selected.

a. If the 10% infection rate is correct, what is the probability that at least 5 patients out of the 50 will have an infection?

b. What assumptions are you making in computing the probability in part (a)?

1. If a student does not completely dry the copper oxide and filter paper, what effect will that have on the ratio of copper to oxygen?