problems-solved

Type of arrangement of capacitors where the equivalent capacitance is the sum of the capacitances of each capacitor

The name of the Greek letter used to represent electromotive force

The process at the most detailed level of the data flow diagrams are called

(A) Interfaces

(B) Data flows

(C) Functional primitives

(D) Transform descriptions

The first step to the system study project is to

(A) Announce the study project

(B) Staff for the study project

(C) Describe information needs

(D) Define system performance criteria

Top down software design

(A) is the process of designing a program by first identifying its modules

(B) decomposes major components into lower level components

(C) both (a) and (b)

(D) none of these

Full form of PCB

aoa network diagrams use only _____ dependencies.

How do I make text in html colored 

4.  Write a nested for loop for the following sequence:

            1123212331234123

1. Which of the following elements would have similar properties to Sulfur?

a. Chlorine b. Argon c. Aluminum d. Oxygen

2. Which element is likely to react violently with water (Hint: think back to the demo you saw!)?

a. Beryllium b. Carbon c. Caesium d. Sulfur

3. Which element is most likely to be a clear, colourless, odourless gas that is unreactive?

a. Fluorine b. Krypton c. Nitrogen d. Hydrogen

4. Which statement is correct?

a. Be is more reactive than Li c. O is more reactive than F

b. Kr is more reactive than Br d. Ra is more reactive than Be

5. Which of the following are true about the Alkaline Earth metals?

a. They all have 2 electrons in their valence shell

b. They are the most reactive group of metals

c. They burn with bright colourful flames, and are used in fireworks

d. All of the above are true

e. Only a. and c. are true

6. Rutherford’s gold foil experiment showed that…

a. electrons do not surround the nucleus in a random cloud, but rather in organized orbitals

b. atoms have a tiny, positively charged nucleus

c. electrons crowd tightly together at an atom’s centre

d. atoms contain neutrons

7. Which determines the identity of an atom?

a. the sum of protons and neutrons c. number of neutrons

b. number of protons in the nucleus d. its driver’s license

8. If an atom has six protons, six electrons, and eight neutrons it must be an isotope of…

a. carbon b. silicon c. oxygen d. magnesium

9. An atom has a mass number of 20 and it contains 10 neutrons. What element must it be?

a. calcium b. neon c. zinc d. More information is needed.

10. Which of the following statements is correct?

a. Protons and electrons are located in the nucleus of an atom.

b. All atoms of the element lithium will have 4 neutrons.

c. The energy level closest to the nucleus is the valence shell.

d. Two atoms of the same element can have different numbers of neutrons.

11. Which phrase best describes a group or family in the periodic table?

a. Elements that have the same melting point.

b. Elements that have the same number of electrons in their outermost orbits.

c. Elements in the same group all have the same number of orbitals/energy levels.

d. Elements that are in the same row.

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

Grade 9 chemistry:

A metal with a mass of 0.74 kg occupies a volume of 35 cm3. Calculate the density of the metal. Use G.R.A.S.P.

Using the driving distance from your home to Point B, what would your average speed be if the trip takes you exactly 4.50h? 

Driving Distance: 489 km

Solve the Program :

Addition of two numbers in python.

Mention a loop structure in Python that gets executed when a given condition is true. Also, print the series 1, 4, 9, 16, ..., N using that loop.

Write a Python function find_duplicates(items1, items2) which takes
two lists of values as argument and returns a list containing all values which
were present in both lists.
The function must work both for lists of strings and list of integers.