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# R P Feynman

## Biodata of RP Feynman

RP Feynman was appointed as a senior scientist even before his doctoral degree,when he was only 23!

It is said that he did a calculation which no other physicist present there could, and rectified a theory that Bohr proposed.

His code name in Manhattan project was Mr Hayley

He won the Noble prize in physics 1965,Einstein prize 1954,Ernst O Lawrence prize 1962 and many more

## 𝙌𝙐𝙄𝙕 𝙌𝙐𝙀𝙎𝙏𝙄𝙊𝙉3

𝕠𝕦𝕥 𝕨𝕚𝕥𝕙 𝕒𝕟𝕠𝕥𝕙𝕖𝕣 𝕧𝕖𝕣𝕤𝕚𝕠𝕟 𝕠𝕗 𝕢𝕦𝕚𝕫 𝕢𝕦𝕖𝕤𝕥𝕚𝕠𝕟.

𝗧𝗢𝗗𝗔𝗬’𝗦 𝗤𝗨𝗘𝗦𝗧𝗜𝗢𝗡 𝗜𝗦 :

## 𝗠𝗮𝘁𝗵𝗲𝗺𝗮𝘁𝗶𝗰𝘀 :

𝗛𝗼𝘄 𝗺𝗮𝗻𝘆 𝗳𝗮𝗰𝘁𝗼𝗿𝘀 𝗼𝗳 𝘁𝗵𝗲 𝗻𝘂𝗺𝗯𝗲𝗿 77760000 𝗮𝗿𝗲 𝘁𝗵𝗲𝗿𝗲?

(𝗮) 𝟮𝟱𝟬

(𝗯)𝟯𝟬𝟬

(𝗰) 𝟯𝟱𝟬

(𝗱) 𝟰𝟬𝟬

## Inability

The name makes the post negative.

I am student of a residential school (a school which is one among the most Prestigious in India). Now I am staying at home because of a short term vacation, but our school has opened, thus I will be unable to post more.

‘ll miss ya wordpress! 🤩

## TODAY’S quiz:Mathematics

How many factors does the number 77760000 have?

(a) 250

(b) 300

(c) 350

d) 400

## Quiz question#2

Well, for many days I was inactive….still that doesn’t matter much. I ‘m out with 2nd version of quiz question

/

Answer to previous version:
The leaves of tamarind contain tartaric acid, which mixes with the soil and makes it acidic . That is why usually very less plants thrive there. 

## TODAY’S QUESTION:

Best regards
Arka, 🙃

## The 4 number systems — A brief introduction about them

There are many number systems in Mathematics and Computer science but 4 among them are the most recognized. This post briefly discusses about these 4 number systems.

# Brief structure

But how to write numbers in each system?

Consider a number…. umm… 42.How to write it? Wait, let’s check. We write the number using it’s place value in all the system.

Ok, 1st write 42 in decimal.
42 = 4×10^1 + 2×10^0(remember, the rightmost place's value is base^0 and the power increases as we move left.. The face value of the digit is multiplied with the value of the place to  get place value).
So the number 42 in decimal is (42)10.
Now in binary form
42 = 1×2^5 +0×2^4+ 1×2^3 + 0×2^2+1×2^1+0×2^0.
So the number 42 in binary is (101010)2.
Now in octal.
42 = 5×8^1 + 2×8^0.
So the number 42 in octal is (52)8.
42 = 2×16^1+10×16^0.
But the value of 10 denoted by A.
So, 42 in hexadecimal is (2A)16

But this system takes time during converting from systems except decimal. Is there any solution? Yes, there is, but that we will post later.

stay home stay safe,

arka🙃

## Calculate Factorial of a Number in C++, C and Javascript

Hello friends! Welcome to our site namely Science & cyber. In the previous post regarding coding, we showed you how can we make a simple calculator using basic Javascript, HTML & CSS. In this post, we are going to show you how we can easily calculate Factorial of a number .

# Before that…..

You need to know :

• What is factorial of a number
• The respective programing language.

# C language

#include <stdio.h>
int main () {
int number;
long double factorial = 1;
int a = 1;
//specifying data types
int k = 1;
while (k == 1) {
printf("Enter the number ") ;
scanf("%d",&number) ;
/* The number value is taken */
if(number >= 1) {
for(a= 1;a<=number;a++) {factorial = factorial*a;}
printf(" The factorial is %Lf \n", factorial) ;
}
else if(number == 0) {printf("The factorial is 1\n");}
else {printf("Enter zero or positive integer\n") ;}
}
}


# C++ language

#include <iostream>
using namespace std;
int main() {
int number;
double factorial = 1;
int k;
cout << "Enter the number \t";
cin >> number;
if(number>=1) {
for(k = 1; k <= number; k += 1)
{factorial = factorial*k;}
cout << factorial;
}
else if(number == 0) {factorial = 1;
cout << factorial;}
else {cout << " enter either 0 or positive integer ";}
return 0;
}


Check the code right here

# Javascript..

<! DOCTYPE html>
<html>
<body>
<h1>Calculate factorial</h1>
<p>Enter the number:</p>
<input id="inp"type="number" style = "border:2px dotted green"/>
<button style = "height:30;width:40;color:blue "onclick = " fx();" >Calculate</button>
<p id = "res"></p>
<script>
function fx(){
let k = document.getElementById('inp').value;
let a = 1;
let b = 1;
if(k>=1) {
for(b = 1; b<= k; b += 1)
{a= a*b;}
document.getElementById('res').innerHTML = a;
}
else if(number == 0) {a = 1;
document.getElementById('res').innerHTML = a;;}
else {document.getElementById('res').innerHTML =  " enter either 0 or positive integer ";}
}
</script>
</body>
</html>



Check the code right here

## Quiz Question#1

Hello friends! I’ve decided to give you some questions every week. This is the 1st edition.

I hope all of us have seen a tamarind tree.

## Question:

Why do only very few plants and no big tree can grow underneath a tamarind tree? I want scientific answer, not religious/mythological.

Difficulty : easy.

## Byee for today, meet you soon.

Actually, for any big tree, answer would be shade. But there is something special about tamarind. Trees can’t grow even aside tamarind.

## HTML CALCULATOR:HOW TO MAKE?

Hey guys! Welcome to this site namely Science & cyber. Here in this post I am going to show how to make a calculator by JavaScript and HTML &CSS.If you have any doubt, just ask in comment section.

## Things you need to know

So there must be some earlier requirements for making a program

• Basic CSS & JAVASCRIPT
• HTML
• USE OF INPUT TAG AND BUTTON TAG

## THE CODE

<! DOCTYPE html>
<html>
<title>
HTML Calculator</title>
<style>
button{
background-color:yellow;
color:purple;
height:40px;
width:50px
}
input{background-color:white;
color:purple}
h1{font-size:250%}
</style>
<body>
<h1>ARKA'S HTML CALCULATOR</h1>
<div>
<table>
<tr>
<td colspan="4" ><input  id="res"/></td>
</tr>
<tr>
<td ><button onclick="dis(7)">7</button></td>
<td ><button onclick="dis(8)">8</button></td>
<td ><button onclick="dis(9)">9</button></td>
<td ><button onclick="dis('+')">+</button></td>
</tr>
<tr>
<td ><button onclick="dis(4)">4</button></td>
<td ><button onclick="dis(5)">5</button></td>
<td ><button onclick="dis(6)">6</button></td>
<td ><button onclick="dis('-')">-</button></td>
</tr>
<tr>
<td ><button onclick="dis(1)">1</button></td>
<td ><button onclick="dis(2)">2</button></td>
<td ><button onclick="dis(3)">3</button></td>
<td ><button onclick="dis('*')">*</button></td>
</tr>
<tr>
<td ><button onclick="dis(0)">0</button></td>
<td ><button onclick="clr()">C</button></td>
<td ><button onclick="dis('/')">/</button></td>
<td><button onclick="slv()">=</button></td>
</tr>
</table>
<script>
function clr(){
document.getElementById('res').value = " "
}
function dis(val){
document.getElementById('res').value += val
}
function slv(){
let x = document.getElementById('res').value
let y= eval(x)
document.getElementById('res').value=y
}
</script>
</body>
</html>



If you have any queries, you know what to do – just comment.

## Caution

Some HTML editors have some extra rules. For example, this code does not work in w3schools html tryit editor. For the code which runs in w3schools;click Here

## Solution?

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Byee for today, meet you soon.