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katen-ka-za [31]
3 years ago
6

Einstein's famous equation states that the energy in an object at rest equals its mass times the squar of the speed of light. (T

he speed of light is 300,000,000 m/s.) Complete the skeleton code below so that it: Accepts the mass of an object [remember to convert the input string to a number, in this case, a float). Calculate the energy, e Prints e Code Full Screen code.py' New m-str. input('Input m: 1 ') # d not change this line change m str to a float # remember you need c s Iine 8 print("e:", e) # do not change Save & Run Tests
Computers and Technology
1 answer:
musickatia [10]3 years ago
4 0

Answer:

The complete program is as follows:

m_str = input('Input m: ')

mass = float(m_str)

e = mass * 300000000**2

print("e = ",e)

Explanation:

This is an unchanged part of the program

m_str = input('Input m: ')

This converts m_str to float

mass = float(m_str)

This calculates the energy, e

e = mass * 300000000**2

This is an unchanged part of the program

print("e = ",e)

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Extend to also calculate and output the number of 1 gallon cans needed to paint the wal. Hint: Use a math function to round up t
Crank

Answer:

Here is the Python program:

import math #import math to use mathematical functions

height = float(input("Enter wall height (feet): ")) #prompts user to enter wall height and store it in float type variable height

width = float(input("Enter wall width (feet): ")) #prompts user to enter wall width and store it in float type variable width

area = height *width #computes wall area

print('Wall area: {} square feet'.format(round(area))) #displays wall area using round method that returns a floating-point number rounded

sqftPerGallon = 350 #sets sqftPerGallon to 350

paintNeeded = area/ sqftPerGallon #computes needed paint

print("Paint needed: {:.2f} gallons".format(paintNeeded)) #displays computed paint needed up to 2 decimal places

cansNeeded = int(math.ceil(paintNeeded)) #computes needed cans rounding the paintNeeded up to nearest integer using math.ceil

print("Cans needed: {} can(s)".format(cansNeeded)) #displays computed cans needed

colorCostDict = {'red': 35, 'blue': 25, 'green': 23} #creates a dictionary of colors with colors as key and cost as values

color = input("Choose a color to paint the wall: ") #prompts user to enter a color

if color in colorCostDict: #if the chosen color is present in the dictionary

    colorCost = colorCostDict.get(color) #then get the color cost from dictionary and stores it into colorCost using get method that returns the value(cost) of the item with the specified key(color)

    cost = cansNeeded * colorCost #computes the cost of purchasing paint of specified color per cansNeeded

  print("Cost of purchasing {} paint: ${}".format(color,colorCostDict[color])) #displays the real cost of the chosen color paint

print("Cost of purchasing {} paint per {} gallon can(s): ${}".format(color,cansNeeded, cost)) #displays the cost of chosen color paint per cans needed.

Explanation:

The program first prompts the user to enter height and width. Lets say user enter 20 as height and 50 as width so the program becomes:

Wall area computed as:

area = height *width

area = 20 * 50

area = 1000

Hence the output of this part is:

Wall area: 1000 square feet                                                                                                                     Next program computes paint needed as:

paintNeeded = area/ sqftPerGallon

Since sqftPerGallon = 350 and area= 1000

paintNeeded = 1000 / 350

paintNeeded = 2.86

Hence the output of this part is:

Paint needed: 2.86 gallons

Next program computes cans needed as:      

cansNeeded = int(math.ceil(paintNeeded))

This rounds the computed value of paintNeeded i.e. 2.86 up to nearest integer using math.ceil so,

cansNeeded = 3                                                                  

Hence the output of this part is:

Cans needed: 3 can(s)                                                                                                                            Next program prompts user to choose a color to paint the wall

Lets say user chooses 'blue'

So the program get the cost corresponding to blue color and multiplies this cost to cans needed to compute the cost of purchasing blue paint per gallon cans. So

cost = cansNeeded * colorCost

cost = 3 * 25

cost = 75

So the output of this part is:

Cost of purchasing blue paint per 3 gallon can(s): $75                                                                                        The screenshot of the program along with its output is attached.

5 0
3 years ago
How do mutations affect natural selection? brain pop
Cerrena [4.2K]

Answer:

please give me brainlist and follow

Explanation:

Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).

3 0
3 years ago
Trying to make the baseplate red and turn off can collide then the game waits 5 seconds and turns on can collide, making the bas
kenny6666 [7]

Answer:

Explanation:

yes

but dont forget to call makeBasePlateGreen

maybe you would call it at the end of the program?

by the way you have a typo at the end

make the O lowercase

myBlasePlate.BrickColor = BrickColor.Green()

and then add this to the end

makeBasePlateGreen()

so you call the function and actually use it.

4 0
2 years ago
What did the strict study generally find about the effect of internet use on sleep?
rjkz [21]
A. should be the answer hope this helps :)
4 0
3 years ago
Read 2 more answers
In the following cell, we've loaded the text of Pride and Prejudice by Jane Austen, split it into individual words, and stored t
Sever21 [200]

Answer:

Explanation:

Since the array is not provided, I created a Python function that takes in the array and loops through it counting all of the words that are longer than 5. Then it returns the variable longer_than_five. To test this function I created an array of words based on the synapse of Pride and Prejudice. The output can be seen in the attached picture below.

def countWords(p_and_p_words):

   longer_than_five = 0

   for word in p_and_p_words:

       if len(word) > 5:

           longer_than_five += 1

   return longer_than_five

7 0
3 years ago
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