catalogue

### 1. Title: (Science: wind cold temperature) how cold is it outdoors? Temperature alone is not enough to provide an answer. Other factors: wind speed, relative temperature and light all have a great impact on the outdoor cold degree. Write a program to prompt the user to enter a temperature between - 58 ° F and 41 ° F and a wind speed greater than or equal to 2 miles per hour, and then display the cold temperature.

Formula: t(wc)=35.74+0.6215*t(a)-35.75*(v**0.16)+0.4275*t(a)*(v**0.16)

Implementation objectives: Enter the temperature in Fahrenheit between -58 and 41: 5.3 Enter the wind speed in miles per hour: 6 The wind chill index is -5.56707

code: ta = float(input("Enter the temperature in Fahrenheit:")) v = float(input("Enter thee wind speed in miles per hour:")) twc = 35.74+0.6215*ta-35.75*(v**0.16)+0.4275*ta*(v**0.16) print("The wind chill index is %.5f" % twc)

Execution results:

### 2. Title: (Physics: calculate the run length) assuming that the acceleration a and take-off speed v of the aircraft are given, calculate the shortest runway length required for aircraft take-off. Write a program to prompt the user to enter v in meter / second (m/s) and a in meter / second square (m/s*s), and then display the shortest run length.

Formula: length = (v * v) / (2 * a)

Implementation objectives: Enter speed and acceleration: 60,3.5 The minimum runway length for this airplane is 514.286 meters

code: v, a = eval(input("Enter speed and acceleration: ")) length = (v * v) / (2 * a) print("The minimum runway length for airplane is %.3f meters" % length)

Execution results:

### 3, Title: (dividing numbers) write a program to prompt the user to enter four digit integers and display them in reverse order

Implementation objectives:

Enter an integer: 5213

3

1

2

5

code: num = input("Enter an integer: ") num1 = tuple(num) print(num[3]) print(num[2]) print(num[1]) print(num[0])

Execution results:

### 4. Title: (geometry; triangle area) write a program to prompt the user to input the three vertices (x1,y1), (x2,y2),(x3,y3) of the triangle, and then display its area.

Formula: s = (side1 + side2 + side3)/2 area = (s*(s-side)(s-side2)(s-side3))**0.5

Implementation objectives: Enter three points for a triangle: 1.5,-3.4,4.6,5,9.5,-3.4 The area of the triangle is 33.6

code: x1, y1, x2, y2, x3, y3 = eval(input("Enter three points for a triangle:")) side1 = ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5 side2 = ((x3 - x1) ** 2 + (y3 - y1) ** 2) ** 0.5 side3 = ((x2 - x3) ** 2 + (y2 - y3) ** 2) ** 0.5 s = (side1 + side2 + side3) / 2 area = (s * (s - side1) * (s - side2) * (s - side3)) ** 0.5 print("The area of the triangle is %.1f" % area)

Execution results:

### 5, Title: (geometry: area of regular hexagon) write a program to prompt the user to enter the side length of regular hexagon and display its area.

Formula: Area = (3*(3**0.5)*(s*s))/2

Implementation objectives: Enter the side: 5.5 The area of the hexagon is 78.5895

code: side = float(input("Enter the side: ")) area = (3 * (3 ** 0.5) * (side * side)) / 2 print("The area of the hexagon is %.4f" % area)

Execution results: