Light travels at 3 × 108 meters per second. A light-year is the distance a light beam travels in one year.Write a PYTHON program

Answer: genetic algorithm


Explanation: A genetic algorithm is a smart system that imitates the natural process of evolution to develop progressively better solutions toward a specific challenge. These algorithms are commonly utilized in the design of components for aircraft, such as fan blades, among other applications.

Answer:

The correct expression for the problem is: "Math.sqrt(area*2)".

Explanation:

• The Math.sqrt( ) method in JavaScript finds the square root of the provided value.
• Syntax: Math.sqrt(value) which takes a single variable value that denotes the number whose square root needs to be calculated.
• The area of a shape signifies how many squares are required to completely cover it, much like tiles on a floor.

The area of the square is calculated as the length of a side squared.

Since all square sides are equal, the length of a square is represented exclusively by one side.

Thus, this represents the correct answer.

Answer:

Primary information

Explanation:

There exist three categories of information: primary, secondary, and tertiary. Primary information refers to original sources like research journals, diaries, poetry, surveys, interviews, etc. Secondary information encompasses texts such as textbooks, encyclopedias, and reviews that describe or analyze primary data. Tertiary information serves as a repository for both primary and secondary knowledge.

Answer:

package lab1;

import java.util.ArrayList;

import java.util.Iterator;

public class ArrayListMethodsTester

{

public static void main(String[] args)

{

ArrayList<String> stringArray = new ArrayList<String>();

stringArray.add("This");

stringArray.add("is");

stringArray.add("an");

stringArray.add("ArrayList");

stringArray.add("of");

stringArray.add("Strings");

System.out.println("Displaying the arraylist:");

ArrayListMethods.print(stringArray);

System.out.println("\nCondensing the ArrayList:");

ArrayListMethods.condense(stringArray);

ArrayListMethods.print(stringArray);

System.out.println("\nDuplicating the ArrayList:");

ArrayListMethods.duplicate(stringArray);

ArrayListMethods.print(stringArray);

}

}

class ArrayListMethods

{

static void print(ArrayList stringArray)

{

Iterator it = stringArray.iterator();

while (it.hasNext())

System.out.println(it.next() + " ");

}

static void condense(ArrayList stringArray)

{

int length=stringArray.size();

ArrayList cloneArray=(ArrayList) stringArray.clone();

stringArray.clear();

StringBuilder sb=new StringBuilder("");

for (int i = 0; i < (length/2); i++)

{

sb.append(cloneArray.get(i));

sb.append(" ");

}

stringArray.add(sb);

StringBuilder sb1=new StringBuilder("");

for (int i = (length/2); i < length; i++)

{

sb1.append(cloneArray.get(i));

sb1.append(" ");

}

stringArray.add(sb1);

}

static void duplicate(ArrayList stringArray)

{

for (int i = 0; i < stringArray.size(); i+=2)

{

stringArray.add(i+1,stringArray.get(i));

}

}

}

Explanation:

• Calculate the size of the arraylist to duplicate it into a secondary arraylist.
• Clear the original array to prepare for new contents.
• Implement a loop to process half of the original array.
• Employ another loop to handle the remaining half of the array and concatenate all into a unified string.

Your issue arises from using elif and if constructs. When one of your conditions is true, the others are bypassed. Instead, you should apply multiple if statements in place of elif and else. For example:

car_year = int(input())

if car_year <= 1969:

   print('Few Safety features.')

if car_year >= 1970:

   print('Probably has seat belts.')

if car_year >= 1990:

   print('Probably has antilock brakes.')

if car_year >= 2000:

   print('Probably has airbags.')

I have implemented my code using Python 3.8. I hope this proves beneficial.