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Code Conversion

Convert kelvin to fahrenheit

Temperature conversion is an essential aspect of many scientific and everyday calculations. Different temperature scales are used in various parts of the world and different contexts. Kelvin (K) and Fahrenheit (°F) are two commonly used temperature scales. Kelvin is an absolute temperature scale used primarily in scientific fields, while Fahrenheit is often used in the United States for weather and temperature reporting. Converting temperatures from Kelvin to Fahrenheit is important when working with different units of measurement.

Problem Statement and Description

The task is to convert a temperature given in Kelvin to its equivalent value in Fahrenheit. Fahrenheit is a temperature scale commonly used in the United States. The conversion formula from Kelvin to Fahrenheit is fahrenheit = (kelvin - 273.15) * (9/5) + 32. This formula first subtracts 273.15 from the Kelvin temperature to get the equivalent temperature in Celsius, then multiplies by 9/5 and adds 32 to obtain the temperature in Fahrenheit.

Example

Let's illustrate the problem with an example. Suppose we have a temperature of 300 K that we want to convert to Fahrenheit. Using the formula:

Fahrenheit = (Kelvin - 273.15) * (9/5) + 32
Fahrenheit = (300 - 273.15) * (9/5) + 32
Fahrenheit ≈ 80.33

So, 300 K is approximately equivalent to 80.33°F.

Idea to Solve the Problem

To solve this problem, we need to create a program that takes a temperature in Kelvin as input, applies the conversion formula, and outputs the equivalent temperature in Fahrenheit. We will define a function to perform this conversion, and the main program will call this function for different test cases.

Pseudocode

Here's the pseudocode for the program:

function kelvin_to_fahrenheit(kelvin):
    fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32
    return fahrenheit

main:
    kelvin_to_fahrenheit(1)
    kelvin_to_fahrenheit(604.5)
    kelvin_to_fahrenheit(280.90)

Algorithm Explanation

  1. Define the kelvin_to_fahrenheit function that takes a parameter kelvin.
  2. Inside the function, calculate the equivalent temperature in Fahrenheit using the formula (kelvin - 273.15) * (9/5) + 32.
  3. Return the calculated temperature in Fahrenheit.
  4. In the main program, call the kelvin_to_fahrenheit function with different test cases: 1, 604.5, and 280.90.
  5. Print the results.

Program Solution

//C Program 
//Convert kelvin to fahrenheit
#include <stdio.h>

//Find the fahrenheit by given kelvin
void kelvin_to_fahrenheit(double kelvin)
{
	// Formula : (kelvin - 273.15) * (9/5) + 32
	// Calculate given kelvin to fahrenheit 
	double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
	//Display result
	printf("Kelvin : %lf  Fahrenheit : %lf\n", kelvin, fahrenheit);
}
int main()
{
	//Simple test
	kelvin_to_fahrenheit(1);
	kelvin_to_fahrenheit(604.5);
	kelvin_to_fahrenheit(280.90);
	return 0;
}

Output

Kelvin : 1.000000  Fahrenheit : -457.870000
Kelvin : 604.500000  Fahrenheit : 628.430000
Kelvin : 280.900000  Fahrenheit : 45.950000
/*
  Java program
  Convert kelvin to fahrenheit
*/
class MyMath
{
	//Find the fahrenheit by given kelvin
	public void kelvin_to_fahrenheit(double kelvin)
	{
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
		System.out.print("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
	}
	public static void main(String[] args)
	{
		MyMath obj = new MyMath();
		//Simple test
		obj.kelvin_to_fahrenheit(1);
		obj.kelvin_to_fahrenheit(604.5);
		obj.kelvin_to_fahrenheit(280.90);
	}
}

Output

Kelvin : 1.0 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95
/*
  C++ program
  Convert kelvin to fahrenheit
*/
#include<iostream>

using namespace std;
class MyMath
{
	public:
		//Find the fahrenheit by given kelvin
		void kelvin_to_fahrenheit(double kelvin)
		{
			// Formula : (kelvin - 273.15) * (9/5) + 32
			// Calculate given kelvin to fahrenheit 
			double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
			cout << "Kelvin : " << kelvin << " fahrenheit : " << fahrenheit << "\n";
		}
};
int main()
{
	MyMath obj ;
	//Simple test
	obj.kelvin_to_fahrenheit(1);
	obj.kelvin_to_fahrenheit(604.5);
	obj.kelvin_to_fahrenheit(280.90);
	return 0;
}

Output

Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95
/*
  C# program
  Convert kelvin to fahrenheit
*/
using System;
class MyMath
{
	//Find the fahrenheit by given kelvin
	public void kelvin_to_fahrenheit(double kelvin)
	{
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
		Console.Write("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
	}
	public static void Main(String[] args)
	{
		MyMath obj = new MyMath();
		//Simple test
		obj.kelvin_to_fahrenheit(1);
		obj.kelvin_to_fahrenheit(604.5);
		obj.kelvin_to_fahrenheit(280.90);
	}
}

Output

Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95
<?php
/*
  Php program
  Convert kelvin to fahrenheit
*/
class MyMath
{
	//Find the fahrenheit by given kelvin
	public	function kelvin_to_fahrenheit($kelvin)
	{
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		$fahrenheit = ($kelvin - 273.15) * (9 / 5.0) + 32;
		echo "Kelvin : ". $kelvin ." fahrenheit : ". $fahrenheit ."\n";
	}
}

function main()
{
	$obj = new MyMath();
	//Simple test
	$obj->kelvin_to_fahrenheit(1);
	$obj->kelvin_to_fahrenheit(604.5);
	$obj->kelvin_to_fahrenheit(280.90);
}
main();

Output

Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95
/*
  Node Js program
  Convert kelvin to fahrenheit
*/
class MyMath
{
	//Find the fahrenheit by given kelvin
	kelvin_to_fahrenheit(kelvin)
	{
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		var fahrenheit = (kelvin - 273.15) * (9 / 5) + 32;
		process.stdout.write("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
	}
}

function main()
{
	var obj = new MyMath();
	//Simple test
	obj.kelvin_to_fahrenheit(1);
	obj.kelvin_to_fahrenheit(604.5);
	obj.kelvin_to_fahrenheit(280.90);
}
main();

Output

Kelvin : 1 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95
#   Python 3 program
#   Convert kelvin to fahrenheit

class MyMath :
	# Find the fahrenheit by given kelvin
	def kelvin_to_fahrenheit(self, kelvin) :
		#  Formula : (kelvin - 273.15) * (9/5) + 32
		#  Calculate given kelvin to fahrenheit 
		fahrenheit = (kelvin - 273.15) * (9 / 5) + 32
		print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n", end = "")
	

def main() :
	obj = MyMath()
	# Simple test
	obj.kelvin_to_fahrenheit(1)
	obj.kelvin_to_fahrenheit(604.5)
	obj.kelvin_to_fahrenheit(280.90)

if __name__ == "__main__": main()

Output

Kelvin :  1  fahrenheit :  -457.86999999999995
Kelvin :  604.5  fahrenheit :  628.4300000000001
Kelvin :  280.9  fahrenheit :  45.95
#   Ruby program
#   Convert kelvin to fahrenheit

class MyMath

	# Find the fahrenheit by given kelvin
	def kelvin_to_fahrenheit(kelvin)
	
		#  Formula : (kelvin - 273.15) * (9/5) + 32
		#  Calculate given kelvin to fahrenheit 
		fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32
		print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n")
	end
end
def main()

	obj = MyMath.new()
	# Simple test
	obj.kelvin_to_fahrenheit(1)
	obj.kelvin_to_fahrenheit(604.5)
	obj.kelvin_to_fahrenheit(280.90)
end
main()

Output

Kelvin : 1 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95
/*
  Scala program
  Convert kelvin to fahrenheit
*/
class MyMath
{
	//Find the fahrenheit by given kelvin
	def kelvin_to_fahrenheit(kelvin: Double): Unit = {
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		var fahrenheit: Double = (kelvin - 273.15) * (9 / 5.0) + 32;
		print("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var obj: MyMath = new MyMath();
		//Simple test
		obj.kelvin_to_fahrenheit(1);
		obj.kelvin_to_fahrenheit(604.5);
		obj.kelvin_to_fahrenheit(280.90);
	}
}

Output

Kelvin : 1.0 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95
/*
  Swift program
  Convert kelvin to fahrenheit
*/
class MyMath
{
	//Find the fahrenheit by given kelvin
	func kelvin_to_fahrenheit(_ kelvin: Double)
	{
		// Formula : (kelvin - 273.15) * (9/5) + 32
		// Calculate given kelvin to fahrenheit 
		let fahrenheit: Double = (kelvin - 273.15) * (9 / 5.0) + 32;
		print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n", terminator: "");
	}
}
func main()
{
	let obj: MyMath = MyMath();
	//Simple test
	obj.kelvin_to_fahrenheit(1);
	obj.kelvin_to_fahrenheit(604.5);
	obj.kelvin_to_fahrenheit(280.90);
}
main();

Output

Kelvin :  1.0  fahrenheit :  -457.87
Kelvin :  604.5  fahrenheit :  628.43
Kelvin :  280.9  fahrenheit :  45.95

Time Complexity

The time complexity of this program is constant for each conversion, as it involves simple arithmetic operations (subtraction, multiplication, and addition). The number of operations remains the same regardless of the input Kelvin temperature. Thus, the time complexity is O(1).

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