AP统计考试考点分析，附往年真题
AP统计学考试与其他科目一样，分为Multiple Choice选择题和Free Response简答题两部分，考试时间各为90分钟，全程可以使用计算器(推荐使用TI-84 plus CE或N’Spire)。 其中Multiple Choice部分会包含40道选择题，...
IB DP Physics: SL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: SL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: SL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: SL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: SL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...
IB DP Physics: SL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: SL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: SL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 ...
