AQA A Level Physics復(fù)習(xí)筆記2.2.5 Quarks & Antiquarks
Properties of Quarks & Antiquarks Quarks The three most common flavours of quarks are:?up, down?and?strange The majority of hadrons are made up of different combinations of these quarks ...
AQA A Level Physics復(fù)習(xí)筆記2.2.4 Leptons
Leptons & Antileptons Leptons?are a group of?fundamental?(elementary) particles This means they are not made up of any other particles (no quarks) Leptons interact with other part...
AQA A Level Physics復(fù)習(xí)筆記2.2.3 Mesons
Pions & The Strong Nuclear Force Pions Pions (π–mesons) can be positive (π+), negative (π–) or neutral (π0) The anti–particle of the positive pion is the negative pion (and vice versa) T...
AQA A Level Physics復(fù)習(xí)筆記2.2.2 Baryons
Baryon Number The baryon number,?B, is the number of baryons in an interaction B?depends on whether the particle is a baryon, anti-baryon or neither Baryons have a baryon number?B?= +1 Anti-...
AQA A Level Physics復(fù)習(xí)筆記2.1.5 Particles, Antiparticles & Photons
Antimatter The universe is made up of?matter?particles (protons, neutrons, electrons etc.) All matter particles have antimatter counterparts Antimatter particles are identical to their matte...
AQA A Level Physics復(fù)習(xí)筆記2.1.4 Alpha & Beta Decay
α & β Decay Equations Alpha Decay Alpha decay is common in large, unstable nuclei with too many protons The decay involves a nucleus emitting an alpha particle and decaying into a differ...
AQA A Level Physics復(fù)習(xí)筆記2.1.3 Strong Nuclear Force
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, gravity is a ve...
AQA A Level Physics復(fù)習(xí)筆記2.1.2 Nucleon & Proton Number
AZX Notation A nuclide is a group of atoms containing the same number of protons and neutrons For example, 5 atoms of oxygen are all the same nuclide but are 5 separate atoms Atomic s...
2022藤校申請國際賽事來助力！下半年高含金量國際賽事盤點(diǎn)
《華爾街日報》發(fā)布了一則今年美國學(xué)生的真實(shí)申請案例：來自德州公立高中的Kaitlyn，擁有著11門AP課程滿分、SAT 1550分、未加權(quán)的3.95GPA，以及高中會計社團(tuán)創(chuàng)始人的背景。 沒想到成績優(yōu)秀的她，竟然被哈佛、斯坦...
