Let's get the basics straight first.We live on earth which is the 3rd planet from the sun. The sun is a star, just like all the others you see in the sky, it's just a hell of a lot closer to us. It's pretty big too, and we orbit around it. We live on the one called 'Earth' by the way Click read more to read the rest! (it's all free!)
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Syllabus Statements :What on earth is radioactivity?Radioactivity is basically a way for the nuclei (plural of nucleus) of atoms to become more stable. These instabilities in the nucleus arise when there are too many or too little neutrons in the nucleus, usually in isotopes of atoms that have I high mass. There are 3 ways that nuclei can become more stable, Alpha, Beta and Gamma radiation (This is actually not true but you only need to know 3). note: Whenever we're talking about radioactivity, forget about the electrons in the shells orbiting the nucleus, we're only interested in the Nucleus specifically. Electrons are still important though (Beta).
This is very important skill in the electromagnetism topic. What on earth is electromagnetism? Well, if you look at the word you can probably guess. It's when you use electricity to generate a magnetic field. Electricity creates a magnetic field? Yes it does! This is what Faraday is so famous for! Fleming's left hand rule Remember to use your LEFT hand for this or you'll be wrong.
The Thumb represents the movement of the wire. This is usually what you'll be using the left hand rule to find out. The first finger or index finger represents magnetic field. Point this finger in the direction of the magnetic field, keeping in mind that the magnetic field runs from north to south. The third finger or middle finger represents current. Point this in the direction that the current travels in, keeping in mind that current travels from + to -
I hope this was useful! I will be posting again later on motors, the awesome real life use of electromagnetism! Let me know in the comments if this is useful or not, and what I can do to improve! Feel free to email me about any questions you have about this post! If you want more go to my home page and fill out my questionnaire on what topics I should post on! Thanks to people who answered my questionnaire, I will post on these topics for you as soon as possible!
Electricity! This topic is actually my favourite ever! Anyway, that isn't important for you. Today I'm going to go through series and parallel circuits and when and where to use them and why. This is generally well understood by people which is good.
Series Advantages
Disadvantages
Parallel advantages
Disadvantages
As usual guys I hope you found this useful! If not, let me know in the comments and I'll re write it or make a video on it.
Syllabus statements components Unfortunately for you if you don't like physics, there are a number of electrical components you need to know about. Today I'll be going through them so hopefully you can understand their purposes better. Click Read More to learn about components and their circuit symbols
Syllabus statements 2.1, 2.11, 2.14 - 2.17 Circuits! Ok so first things first, let me introduce you to the simple circuits. Series circuits and parallel circuits.
Newtons 1st, 2nd and 3rd laws (and also Terminal Velocity, Weight, Gravity and resultant forces) They're honestly easier than you think they are. The first thing to learn is what resultant force means. Resultant force is the same as NET force. NET force being the difference in opposite forces. So for example if I have 20 N to the left and 10N to the right then the resultant force is 10N to the left.
Seems suitable to make my first post about the first section of the IGCSE Edecxel Physics Syllabus. This is generally well understood but people get confused about what the gradients and areas of the graphs mean. Anyway, I have created a YouTube video to help clear this all up. This video covers syllabus statements 1.1 - 1.8, and 1.11 and 1.12 which are about Vectors and Scalars, Distance and Displacement, Distance Time Graphs and Velocity Time Graphs. Let me know if you have any questions! |
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