Edexcel IGCSE Physics 复习笔记 7.3.5 The Conditions for Fusion
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.3.4 Nuclear Fusion
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.3.3 Nuclear Reactors
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.3.2 Nuclear Fission
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.3.1 Nuclear Energy
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.2.5 Dangers of Radiation
Edexcel IGCSE Physics 复习笔记 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 复习笔记 7.2.4 Contamination & Irradiation
Edexcel IGCSE Physics 复习笔记 7.2.4 Contamination & Irradiation Contamination & Irradiation Contamination Contamination is defined as: The unwanted presence of materials cont...
Edexcel IGCSE Physics 复习笔记 7.2.3 Uses of Radioactivity
Edexcel IGCSE Physics 复习笔记 7.2.3 Uses of Radioactivity Uses of Radioactivity Radiation is used in a number of different ways: Medical procedures including diagnosis and treatment of canc...
Edexcel IGCSE Physics 复习笔记 7.2.2 Half-Life
Edexcel IGCSE Physics 复习笔记 7.2.2 Half-Life Half-Life It is impossible to know when a particular unstable nucleus will decay But the rate at which the activity of a sample decreases can b...
