IB DP Physics: HL复习笔记8.1.4 Energy Resources
Energy Resources Energy resources are large stores of energy that can be transferred from one form into electrical energy that can be used by society Generating energy reliably requires the use of ...
IB DP Physics: HL复习笔记8.1.3 Primary & Secondary Energy Sources
Primary Energy Sources Primary energy sources are found in nature and have some stored energy capacity To be a primary energy source, there must be: No processing or refining Stored energy must occ...
IB DP Physics: HL复习笔记8.1.2 Sankey Diagrams
Sankey Diagrams Diagrams are used to represent energy transfers These are sometimes called Sankey diagrams The arrow in a Sankey diagram represents the transfer of energy: The end of the arrow poin...
IB DP Physics: HL复习笔记8.1.1 Specific Energy
Specific Energy The amount of energy that a fuel can provide for the amount of fuel used is an important consideration for the modern world In order to compare fuels by unit, either mass or volume ...
IB DP Physics: HL复习笔记7.3.7 The Standard Model of Particle Physics
The Higgs Boson The Higgs-boson was predicted in 1964 The prediction included an approximate mass for the particle, at 125 GeV c–2 This prediction came from the standard model, which required the p...
哈佛大学公布2022年新生数据，国际学生占比提高，亚裔学生录取最多！
随着2021-2022学年的结束，许多美国大学开始公布2022年新生入学数据或更新明年的申请政策。前几日，MIT发布2022年秋季新生数据，3.96%的录取率真的让很多同学大吃一惊。 近日，哈佛大学公布了2022年新生录取数据...
IB DP Physics: HL复习笔记7.3.6 Feynman Diagrams & Confinement
Feynman Diagrams Feynman diagrams are a clear way of representing particle interactions in terms of their incoming and outgoing particles and exchange particles Although there are many variations o...
IB DP Physics: HL复习笔记7.3.5 Fundamental Forces
Fundamental Forces The Strong Nuclear Force In the nucleus, there are electrostatic forces between the protons due to their electric charge and gravitational forces due to their mass Comparatively,...
IB DP Physics: HL复习笔记7.3.4 Particle Conservation Laws
Particle Conservation Laws Charge Electric charge must be conserved during particle interactions This means charge must have the same value overall before and after the interaction Charge is found ...
AQA A Level Maths: Pure复习笔记4.3.2 Arithmetic Series
Arithmetic Series How do I find the sum of an arithmetic series? An arithmetic series is the sum of the terms of an arithmetic sequence The following formulae will let you find the sum of th...
AQA A Level Maths: Pure复习笔记4.3.1 Arithmetic Sequences
Arithmetic Sequences What do I need to know about arithmetic sequences? In an arithmetic sequence, the difference between consecutive terms in the sequence is constant That constant d...
IB DP Physics: HL复习笔记7.3.3 Hadrons, Baryons & Mesons
Hadrons, Baryons & Mesons Hadrons are the group of subatomic particles that are made up of quarks These may be either a: Baryon (3 quarks) Meson (quark and anti-quark pair) Hadrons may be eithe...
