Edexcel A Level Physics:复习笔记6.1 Impulse
Impulse Force is defined as the rate of change of momentum on a body The change in momentum is defined as the final momentum minus the initial momentum These can be expressed as follows: Def...
2022年10-12月高含金量计算机竞赛汇总
申请美国大学越来越内卷，尤其是名校申请。复盘近三年被TOP20录取的大陆学生，或多或少都有学术活动经历，甚至有家长总结“学术活动是申请TOP20的标配”。虽然不是很准确，但已经足以说明“内卷”程度。 2022年已过大...
Edexcel A Level Physics:复习笔记5.38 Atomic Line Spectra
Atomic Line Spectra An emission line spectrum is produced when: An excited electron in an atom moves from a higher to a lower energy level and emits a photon with an energy corresponding to the dif...
Edexcel A Level Physics:复习笔记5.37 The Particle Nature of EM Radiation
The Particle Nature of EM Radiation The Particle Nature of Light In classical wave theory, electromagnetic (EM) radiation is assumed to behave as a wave This is demonstrated by the fact EM radiatio...
Edexcel A Level Physics:复习笔记5.36 The Electronvolt
The Electronvolt The electronvolt is a unit which is commonly used to express very small energies This is because quantum energies tend to be much smaller than 1 Joule The electronvolt is derived f...
Edexcel A Level Physics:复习笔记5.35 The Photoelectric Equation
The Photoelectric Equation Since energy is always conserved, the energy of an incident photon is equal to: The work function + the maximum kinetic energy of the photoelectron The energy within a ph...
2022年10-12月高含金量经济商科竞赛汇总
申请美国大学越来越内卷，尤其是名校申请。复盘近三年被TOP20录取的大陆学生，或多或少都有学术活动经历，甚至有家长总结“学术活动是申请TOP20的标配”。虽然不是很准确，但已经足以说明“内卷”程度。 2022年已过大...
Edexcel A Level Physics:复习笔记5.34 The Photoelectric Effect
The Photoelectric Effect The photoelectric effect is the phenomena in which electrons are emitted from the surface of a metal upon the absorption of electromagnetic radiation Electrons removed from...
Edexcel A Level Physics:复习笔记5.33 Energy of a Photon
Energy of a Photon Photons are fundamental particles which make up all forms of electromagnetic radiation A photon is a massless “packet” or a “quantum” of electromagnetic energy What this means is...
2022年10-12月高含金量人文社科竞赛汇总
申请美国大学越来越内卷，尤其是名校申请。复盘近三年被TOP20录取的大陆学生，或多或少都有学术活动经历，甚至有家长总结“学术活动是申请TOP20的标配”。虽然不是很准确，但已经足以说明“内卷”程度。 2022年已过大...
Edexcel A Level Physics:复习笔记5.32 Wave-Particle Duality
Wave-Particle Duality Light can behave as a particle (i.e. photons) and a wave This phenomenon is called the wave-particle nature of light or wave-particle duality Light interacts with matter, such...
Edexcel A Level Physics:复习笔记5.31 Pulse-Echo Technique
Pulse-Echo Technique Foetal Scanning In medicine, ultrasound can be used to construct images of a foetus in the womb An ultrasound detector is made up of a transducer that produces and detects a be...
