IB DP Physics: HL复习笔记3.1.3 Internal Energy
Internal Energy When a substance gains or loses thermal energy, its internal energy increases or decreases The internal energy of a substance is defined as: The sum of the total kinetic energy and ...
IB DP Physics: HL复习笔记3.1.2 Temperature
Temperature Temperature is a measure of how hot or cold objects are Temperature also determines the direction in which thermal energy will flow between two objects (or between an object and its sur...
IB DP Physics: HL复习笔记3.1.1 Solids, Liquids & Gases
Solids, Liquids & Gases The three states of matter are solid, liquid and gas The kinetic theory of matter is a model that attempts to explain the properties of the three states of matter In thi...
IB DP Physics: HL复习笔记2.4.4 Collisions & Explosions
Collisions & Explosions In both collisions and explosions, momentum is always conserved However, kinetic energy might not always be A collision (or explosion) is either: Elastic – if the kineti...
三大国际课程体系大事连连，国际生到底应该如何应对？
近期三大国际课程体系大事真真是一件接一件啊！IB放榜“爆冷”，AP放榜，五分率稳健增长，A-Level 2023年或大改革。 IB满分人数腰斩！今年全球有173878人（去年165,857人）参加IB考试，人数上涨，但平均成绩却下降...
IB DP Physics: HL复习笔记2.4.3 Conservation of Linear Momentum
Conservation of Linear Momentum The principle of conservation of linear momentum states: The total momentum before a collision = the total momentum after a collision provided no external force acts...
IB DP Physics: HL复习笔记2.4.2 Impulse
Impulse The force and momentum equation can be rearranged to find the impulse Impulse, I, is equal to the change in momentum: I = FΔt = Δp = mv – mu Where: I = impulse (N s) F = force (N) t = time...
IB DP Physics: HL复习笔记2.4.1 Force & Momentum
Force & Momentum Linear momentum, p, is defined as the product of mass and velocity Momentum is a vector quantity - it has both a magnitude and a direction This means it can have a negative or ...
IB DP Physics: HL复习笔记2.3.7 Efficiency
Efficiency The efficiency of a system is a measure of how well energy is transferred in a system Efficiency is defined as: The ratio of the useful power or energy transfer output from a system to i...
