Edexcel A Level Physics:復(fù)習(xí)筆記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...
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2022年10-12月高含金量計(jì)算機(jī)競(jìng)賽匯總
申請(qǐng)美國(guó)大學(xué)越來(lái)越內(nèi)卷，尤其是名校申請(qǐng)。復(fù)盤(pán)近三年被TOP20錄取的大陸學(xué)生，或多或少都有學(xué)術(shù)活動(dòng)經(jīng)歷，甚至有家長(zhǎng)總結(jié)“學(xué)術(shù)活動(dòng)是申請(qǐng)TOP20的標(biāo)配”。雖然不是很準(zhǔn)確，但已經(jīng)足以說(shuō)明“內(nèi)卷”程度。 2022年已過(guò)大...
Edexcel A Level Physics:復(fù)習(xí)筆記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:復(fù)習(xí)筆記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:復(fù)習(xí)筆記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:復(fù)習(xí)筆記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月高含金量經(jīng)濟(jì)商科競(jìng)賽匯總
申請(qǐng)美國(guó)大學(xué)越來(lái)越內(nèi)卷，尤其是名校申請(qǐng)。復(fù)盤(pán)近三年被TOP20錄取的大陸學(xué)生，或多或少都有學(xué)術(shù)活動(dòng)經(jīng)歷，甚至有家長(zhǎng)總結(jié)“學(xué)術(shù)活動(dòng)是申請(qǐng)TOP20的標(biāo)配”。雖然不是很準(zhǔn)確，但已經(jīng)足以說(shuō)明“內(nèi)卷”程度。 2022年已過(guò)大...
Edexcel A Level Physics:復(fù)習(xí)筆記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:復(fù)習(xí)筆記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競(jìng)賽匯總
申請(qǐng)美國(guó)大學(xué)越來(lái)越內(nèi)卷，尤其是名校申請(qǐng)。復(fù)盤(pán)近三年被TOP20錄取的大陸學(xué)生，或多或少都有學(xué)術(shù)活動(dòng)經(jīng)歷，甚至有家長(zhǎng)總結(jié)“學(xué)術(shù)活動(dòng)是申請(qǐng)TOP20的標(biāo)配”。雖然不是很準(zhǔn)確，但已經(jīng)足以說(shuō)明“內(nèi)卷”程度。 2022年已過(guò)大...
Edexcel A Level Physics:復(fù)習(xí)筆記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:復(fù)習(xí)筆記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...
