The Penman

Image source: pngegg.com Transcript of a youtube video: You know the sensation:  maybe you fell asleep on your arm or you crossed your legs for too long, maybe you smacked your elbow in the funny bone: when you free your arm or uncross your legs and an uncomfortable feeling creeps upon you: a strange tingling sensation that is often described as pins and needles.  Now, it's real scientific name is paresthesia, but why does it happen?  Since some of the things that cause pins and needles, like crossing your legs, can also restrict blood flow; it's easy to assume that that's what's causing the feeling and it is sort of but not directly. Instead of paresthesia happens when you interfere with sensory nerves, which send information to the brain and spinal cord about things like how fluffy your dog is, or how much pressure you're putting on something, or whether your drink is still cold.  When your limbs find themselves in awkward positions, you are restricting those nerv

Image source: DoSomething.org 'সুনামি' একটি জাপানি শব্দ যার অর্থ হচ্ছে 'বন্দরের ঢেউ'। পৃথিবীপৃষ্ঠের নড়াচড়ার ফলে সৃষ্ট বিশাল ঢেউকে সুনামি বলে। উদাহরণস্বরূপ, সমুদ্রে ভূমিকম্প বা অগ্নুৎপাতের ফলে সুনামি ঘটতে পারে।  ভূপৃষ্ঠ 'টেকটনিক প্লেট' নামক খন্ডসমষ্টি দ্বারা গঠিত। যখন প্লেটগুলো একটি অপরটিকে এমনভাবে ধাক্কা দেয় যে, কোনো একটি প্লেট পিছলে যায় বা ভেঙ্গে যায়, তখনই ভূমিকম্প ঘটে। পরস্পর এই ধাক্কাধাক্কির সময় প্লেটগুলো অনেক বেশি নড়াচড়া করতে সক্ষম।  ভূমিকম্প ঘটার ফলে একটি বিশাল প্লেট উপরদিকে ধাক্কা দেয় অথবা পাশাপাশি পিছলে যায়। বিশাল প্লেটের এই ধাক্কার ফলে তা উপরের পানিকে সরিয়ে দেয় এবং এই পানি বিশাল ঢেউ হিসেবে আত্মপ্রকাশ করে। যখন সমুদ্রে অগ্নুৎপাত হয় তখনও একই ঘটনা ঘটে। উদগত লাভা পানিকে সরিয়ে দেয় এবং এই পানি বিশাল ঢেউয়ে পরিণত হয়। যখন ভূমিকম্প বা অগ্নুৎপাত বিশাল হয়, তখন এর ফলে সৃষ্ট ঢেউও বিশাল হয়। বড় বড় সুনামিগুলোর সূচনা হয় গভীর সমুদ্রে, যেখানে অনেক পানি অপসারিত হয়। সেই ঢেউ সমুদ্রতটের কাছাকাছি আসতে থাকে, ফলে পানির গভীরতা কমতে থাকে এবং ঢেউও বড় হতে থাকে। একটি ভূমিকম্পের পর যদি প

Image source: collegeessay.org Back story I watched a public debate on Youtube yesterday. The debate was between Muhammad Hijab and Jay Smith. What I understood from the debate was that victory of a debater does not depend on his strong knowledge and powerful side only. There are some tricks, by following those, a weaker debater can defeat a stronger opponent. I will explain those cunning tricks in the context of the debate by Hijab and Jay, and some other religious debates I watched. The tricks 1. You decide the topic: Just like Jay did, you must throw a topic or a question to your opponent that you can attack most. You may plan the topic before the debate. In the debate between Muhammad Hijab and Jay Smith, Jay threw the topic: the emergence of Islam. 2. Keep attacking vigorously with little or no defense: You know you are on the weak side, but you keep avoiding your weakness and continue attacking the opponent's side/argument. 3. Finish last: The last speaker gets the chance to

  Image source: Youtube Back story A lot of new apps are developed every day by a lot of developers around the world. Whenever I need an app to get a specific work done, I search it and find it in almost no time. I use youtube mostly to listen to islamic lectures and sometimes nasheed. So, I usually need the youtube audio only, not video. But there is no way to turn video off and keep the audio only in the official youtube app. A lot of internet data, battery charge is consumed that way. You cannot play video in the background on your smartphone; if you shut the screen off, the video will be off. These problems were annoying and at last I found an app. The name of the android app is YMUSIC , made by XDA developers. Why is it special to me? As I was deprived of the features while using the official app, I was very happy upon finding the app. It includes all the features I dreamed of before using it. The features are: Only audio is loaded, no video. But you can turn on the video if you w

Image source: questions-1001.blogspot.com The question: Why is the sky blue? Why does it turn red at sunset? Curious mind wants to know. The answer: If you have very little knowledge of science, you have to understand some easy facts first. The facts: 1. Sunlight is a composite ray. This is why we see a rainbow. The white ray of the sun is composed of 7 visible colors (violet, indigo, blue, green, yellow, orange, and red) along with other rays (x-ray, infrared ray, etc.). You can test it yourself with a prism. Image source: youtube.com Image source: rookieparenting.com 2. Light spreads like a wave. So, sunlight is a wave that is composed of different waves or rays. Different waves are of different wavelengths. The shorter the wavelength of a wave is, the more it is scattered by particles (gas, dust, etc.). And the longer the wavelength of a wave is, the less it is scattered by particles. Thus, a wave with a shorter wavelength can pass a longer distance. 3. Blue light waves are shorter

Image sourece: newindianexpress.com 1st method:   Draftbook method Preparation part: Read the full chapter yourself. Note down the concept topics in your notebook & decide what you should teach and what not. In front of your student part: Teach him according to the points in your notebook. Just teach the parts you decided before. Give him math homework. Tell him to mark the questions he is unable to solve. Tell him to send the question numbers in a message on messenger or Whatsapp. Homework checking part on the next day: Check the homework. Explain the questions he was unable to solve. Teach him new topics. Experimented subject: Chemistry 2nd part Quantitative Chemistry The preparation part is shown below. This is how you can should list your the points. Watch the full video to get an understanding. https://youtu.be/OYltB9ZlOGQ 2nd method:   Joykoli guide method There are different types for each chapter in the Joykoli book. Approach type by type. Explain one type (explain the form

  Image source: developers.google.com For beginners: Open the document or article you want to translate, put the screen in front, keep a pen and a draft book with you. Start reading the article line by line. Read a whole paragraph and translate line by line in your mother tongue. Then translate it to the second language and write it in your draft book. You may translate long, hard sentences into smaller parts to keep it understandable and easy. Keep enough spacing while writing; this will let you correct your writing. Keep going until you finish the whole article. Read your draft translation and correct your mistakes. Read out loud the translated text into your transcriber app or google voice typing. Correct the mistakes in the transcribed text. Publish. Shortcut for practicers: 3. Translate it to the second language in your mind and read out loud the translation into your transcriber app or google voice typing. 4. Correct the mistakes in the transcribed text. 5. Publish.