Ionisation & Excitation Ionisation?of an atom is: The removal, or addition, of an electron from, or to, an atom when given sufficient energy Excitation?of electrons is: When an electron ...
The Electronvolt The electronvolt is a unit which is commonly used to express very small energies This is because quantum energies tend to be much smaller than 1 Joule The electronvolt is de...
The Four Fundamental Interactions There are four fundamental interactions, or fundamental forces, that exist. These are: Gravity Electromagnetism Strong Nuclear (or Strong Interaction) Weak ...
Edexcel IGCSE Maths復習筆記 1.14.1 Exchange Rates Simplifying exchange rate questions Use ratios! Put exchange rates in?ratio?form (use more than one line if necessary) Add lines for prices/costs U...
Baryons & Mesons Hadrons Hadrons?are the group of subatomic particles that are made up of quarks Therefore, hadrons can feel the?strong nuclear force There are two classes of hadrons: Ba...
Atomic Structure The atoms of all elements are made up of three types of particles: protons, neutrons and electrons. Protons and neutrons are found in the nucleus of an atom while electrons ...
SI Base Quantities There is a seemingly endless number of units in Physics These can all be reduced to six base units from which every other unit can be derived These seven units are referre...
Random & Systematic Errors Measurements of quantities are made with the aim of finding the?true value?of that quantity In reality, it is impossible to obtain the true value of any quanti...
國際社會風云變幻的今天，對于時事熱點話題分享個人見解、加以評論正在成為新一代世界公民的必備素養，大名鼎鼎的紐約時報系列比賽之社論學術活動已經拉開帷幕，優秀的你還不快上車？ 有什么事情使你憤怒？ 你希...
