HSC · Physics · NSW 17 live

HSC Physics, live.

17 Physics concepts you can drag right now, grouped by topic. No account, no login. Each one is the real knowscape from knowhere, not a picture of one. Mapped to the NESA syllabus.

Applications of the Motor Effect
AC Generators and TransformersWhen you spin a coil in a magnetic field, the flux through it constantly changes, inducing a voltage that reverses direction every half rotation.drag it →
Charged Particles in Fields
Force on a Moving ChargeA charge moving through a magnetic field is pushed sideways — and because the force is always perpendicular to the velocity, it changes direction…drag it →
Circular Motion
Circular Motion and Centripetal ForceNothing supplies a mysterious 'centripetal force' — it's whatever real force happens to point at the centre.drag it →
Deep inside the Atom
Particle acceleratorsA particle accelerator is a microscope made of energy: electric fields kick charged particles faster each lap, magnetic fields steer them in a…drag it →
Electromagnetic Induction
Faraday's Law of Electromagnetic InductionThe mathematical expression is ε = -NdΦ/dt, where the negative sign represents Lenz's Law indicating the direction of the induced emf opposes the…drag it →
Electromagnetic Spectrum
Spectroscopy and spectraExcite an atom and it emits light at only certain sharp wavelengths - its fingerprint.drag it →
Light and Special Relativity
Length Contraction and Relativistic MomentumLength contraction states that L = L_0/gamma, where L_0 is the proper length measured in the object's rest frame and L is the contracted length…drag it →
Light: Quantum Model
The Photoelectric EffectEinstein explained this phenomenon in 1905 by treating light as photons that transfer their energy to individual electrons in quantum interactions.drag it →
Light: Wave Model
Diffraction and polarisation (Malus' law)Two behaviours the classical particle model of light cannot explain: bending around obstacles and being filtered by orientation.drag it →
Motion in Gravitational Fields
Gravitational potential energy and potentialThe formula is E = -GMm/r where the negative sign shows that energy must be added to escape to infinity where E = 0.drag it →
Origins of the Elements
Nucleosynthesis in starsHydrogen and helium came from the Big Bang; nearly everything else was forged inside stars.drag it →
Projectile Motion
Projectile motionThe single insight that unlocks every projectile question: horizontal and vertical motion are completely independent.drag it →
Properties of the Nucleus
Nuclear fissionWhen uranium-235 absorbs a neutron it becomes unstable and splits into two medium-mass nuclei plus two or three neutrons, with products having…drag it → Nuclear fusion and stellar energySqueeze light nuclei hard enough and they merge, releasing energy from lost mass via E = mc squared.drag it →
Quantum Mechanical Nature of the Atom
Energy Level Transitions in AtomsThe photon energy exactly equals the energy difference between levels, given by h f equals E upper minus E lower, making emission and absorption…drag it →
Structure of the Atom
Discovering the nucleusGeiger and Marsden fired alpha particles at gold foil expecting gentle deflections from Thomson's diffuse positive pudding - instead, about one in…drag it →
The Motor Effect
Parallel wires and the ampereTwo parallel wires carrying current push on each other without touching: each wire sits in the magnetic field the other one makes, so each feels…drag it →
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