Edexcel IGCSE Physics 復(fù)習(xí)筆記 8.1.2 Gravitational Field Strength Gravitational Field Strength The strength of gravity on different planets after an object's weight on that planet Weight is ...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 8.1.1 Objects in Space Planets, Stars & Galaxies The Universe is is a large collection of billions of?galaxies It? is also the name given to the entirety o...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.3.5 The Conditions for Fusion Fusion in Stars Stars are huge balls of (mostly)?hydrogen?gas In the centre of star, hydrogen atoms undergo?nuclear fusion?to f...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.3.4 Nuclear Fusion Nuclear Fusion Small nuclei can react to release energy in a process called?nuclear fusion Nuclear fusion is defined as: When two l...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.3.3 Nuclear Reactors Chain Reactions Only one extra neutron is required to induce a uranium-235 nucleus to split by fission During the fission, it produces?t...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.3.2 Nuclear Fission Nuclear Fission Nuclear fission is defined as: The splitting of a large, unstable nucleus into two smaller nuclei Isotopes ...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.3.1 Nuclear Energy Nuclear Energy The nucleus of the atom contains a huge amount of energy – roughly one million times greater than the amount of energy invo...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.2.5 Dangers of Radiation Dangers of Radiation Ionising radiation can damage human cells and tissues If the atoms that make up a DNA strand are ionised then t...
Edexcel IGCSE Physics 復(fù)習(xí)筆記 7.2.4 Contamination & Irradiation Contamination & Irradiation Contamination Contamination is defined as: The unwanted presence of materials cont...
