QiLing Tools⚛️Physics Tools & Calculators
Simulations of projectiles, pendulums, collisions and orbits; optics and blackbody radiation; waves and the Doppler effect; circuits and relativity.
42 tools tagged "Physics"
📏Unit ConverterFree online unit converter: length, area, volume, weight, temperature, time, speed, data, pressure, energy and angle — one value converts every unit at once.➡️Vector CalculatorFree online vector calculator for 2D and 3D: addition, scalar multiples, dot and cross products, magnitude, angle, unit vector and projections, with checks.🎯Significant Figures CalculatorFree online sig fig calculator: count significant figures digit by digit, round to N sig figs or decimals with six rounding modes, and compute by sig fig rules.🔉Tone GeneratorFree online tone generator: sine, square, sawtooth and triangle waves from 1 to 20,000 Hz, a note picker, sweeps, white/pink/brown noise and a WAV download.🌌Audio SpectrogramFree online spectrogram generator: see time, frequency and level from a Hann-windowed STFT, with FFT size, log axis, dB range and colour maps. Exports PNG.📢Decibel MeterFree online decibel meter: measure noise with your mic in real time, A/C/Z weighting, fast/slow response, min/max/average/Leq, 60-second graph and calibration.🧲Physics Formula CalculatorPhysics formulas solved with steps: SUVAT, projectiles, Newton’s laws, inclines, energy, Ohm’s law, resistors, RC, buoyancy, waves, lenses, gravity.∿Fourier Series & FFT VisualizerFourier series coefficients and animated partial sums for square, sawtooth, triangle or any function (Gibbs), draw-your-own epicycles and FFT spectra.🌪️Differential Equation SolverODE tool: slope fields with click-to-trace solutions (RK4/RK45), Euler vs RK4 errors, phase portraits with equilibrium types, and 2nd-order linear ODEs.🎈Gas Law CalculatorFree gas law calculator: solve PV=nRT for any variable, combined gas laws, gas density, Dalton's partial pressures, gas over water and van der Waals Z.☢️Half-Life CalculatorSolve radioactive decay for any unknown with 30+ isotopes: decay constant, activity in Bq and Ci, carbon-14 dating and first-order kinetics.🌡️Calorimetry & Specific Heat CalculatorFree calorimetry calculator: solve q = mcΔT with a specific heat table, find the final temperature of mixtures, get ΔH from coffee-cup and bomb calorimetry.💎Unit Cells & Crystal StructuresInteractive 3D unit cells (SC, BCC, FCC, HCP, NaCl, CsCl, ZnS, diamond, perovskite) with atoms per cell, coordination number, packing efficiency and density.🌠Light Energy & Atomic SpectraConvert wavelength, frequency and photon energy (eV, J, kJ/mol), compute hydrogen spectral lines, photoelectric stopping potential and de Broglie wavelength.🎯Projectile Motion Simulator (with Air Resistance)Animated projectile simulator: set speed, angle, height and gravity (Earth, Moon, Mars, Jupiter), add air drag (RK4), compare paths and find the best angle.🕰️Pendulum & Double Pendulum SimulatorSimulate a nonlinear pendulum (RK4) beside its small-angle twin: exact period, damping, phase space and energy plots, plus a chaotic double pendulum.🎱Collision Simulator (Momentum & Energy)Simulate 1D cart collisions with any masses, velocities and restitution e, see momentum and KE before and after, plus 2D billiard collisions.🪐Orbit & Gravity SimulatorDrag a satellite's velocity to get circular, elliptic or hyperbolic orbits with live orbital elements, Kepler's equal areas, N-body demos and Δv tools.🔍Lens & Mirror Ray DiagramInteractive ray diagrams for converging and diverging lenses and concave and convex mirrors: drag the object to see image position, size and magnification.🌈Refraction & Total Internal Reflection SimulatorDrag a light ray through water, glass or diamond: refraction angle, Fresnel reflectance, critical angle, Brewster angle, prism dispersion and apparent depth.🌊Wave Superposition & Standing WavesInteractive wave simulator: superpose traveling waves, see standing waves on strings and pipes with nodes and harmonics, hear beats, and explore a ripple tank.🚑Doppler Effect SimulatorDoppler effect calculator with animation: moving source and observer, Mach cone and sonic boom, relativistic redshift, radar speed guns and pass-by audio.⚡Electric Field & Potential SimulatorDrag point charges and watch electric field lines and equipotentials update live. Probe E and V anywhere, compute Coulomb forces and launch a test charge.🟫Resistor Color Code CalculatorResistor color code calculator for 4, 5 and 6 bands: value, tolerance and tempco; find bands for any value snapped to E12/E24/E96; decode SMD codes like 472.🔌RC / RL / RLC Circuit SimulatorSimulate RC charging and discharging, RL current and RLC step response with τ marks, plus resonance, Q, bandwidth, filter cutoff, Bode plots and live phasors.🚀Special Relativity Calculator & Spacetime DiagramLorentz factor, time dilation and length contraction with a rocket animation, relativistic energy, velocity addition, twin paradox and a Minkowski diagram.🔥Blackbody Radiation & Planck's Law VisualizerPlot Planck blackbody curves for several temperatures with Wien peaks, σT⁴ power, visible fraction, blackbody colour and the Rayleigh–Jeans comparison.🌀Spring Oscillator & ResonanceAnimated spring-mass-damper with driving force: live x(t), damping regime with ω₀, ζ and Q, resonance curves, and coupled normal modes with beats.🧲Magnetic Field SimulatorDrag current-carrying wires and bar magnets to see field lines, compass needles and |B|. Exact loop and solenoid fields, on-axis B(z) and forces between wires.☄️Charged Particle in E & B FieldsElectrons, protons or alphas in any uniform E and B in 3D: gyroradius, period, pitch and E×B drift, plus a velocity selector, mass spectrometer and cyclotron.🔄Electromagnetic Induction & GeneratorMove a magnet through a coil and watch flux, EMF and the galvanometer obey Lenz's law, plus an AC generator, a rod on rails and a transformer.💡DC Circuit Builder & SolverBuild DC circuits on a grid with batteries, resistors, bulbs, switches and meters. Nodal analysis gives every voltage, current and power, plus KCL/KVL.🌗Diffraction, Interference & PolarizationFree wave-optics simulator: slit and grating patterns in white light, Airy disks and the Rayleigh limit, thin-film colours, Newton's rings and Malus's law.🌡️Heat Conduction SimulatorSimulate heat conduction: animated 1D rod (Crank–Nicolson) with real materials, paintable 2D plate, composite wall U-value calculator and Newton cooling fit.💧Fluid Mechanics Simulator (Bernoulli, Buoyancy, Pipe Flow)Interactive fluid mechanics: drag a pipe to see Bernoulli at work, Venturi meter, Torricelli tank draining, buoyancy, Pascal press and Reynolds number.🛞Moment of Inertia & Rotational DynamicsMoment of inertia for rods, disks, spheres, plates and composites with the parallel-axis theorem; rolling race, spinning skater, Atwood machine.🎡Circular Motion & Centripetal Force SimulatorAnimated circular motion: velocity and centripetal vectors, cut the string, centrifugal force, banked curves, coaster loops, conical pendulum.🔬Quantum Mechanics Simulator (Schrödinger Equation)Solve the 1D Schrödinger equation online: energy levels and wavefunctions for wells, oscillators or a drawn potential, plus tunneling wave packets and T(E).♨️Heat Engine Cycles & PV DiagramsInteractive PV and TS diagrams for Carnot, Otto, Diesel, Brayton, Stirling and custom cycles. Drag states, see Q, W, ΔU, ΔS per step, efficiency and COP.🫧Kinetic Theory of Gases SimulatorWatch hundreds of colliding molecules: speed histogram vs Maxwell–Boltzmann, pressure from wall impacts, mean free path, piston heating, effusion and mixing.⚛️Nuclear Binding Energy, Fission & FusionBinding energy per nucleon from AME2020 masses, mass defect and SEMF terms for any nuclide, and Q-values for fusion, fission and decay vs TNT and coal.⚙️Simple Machines Simulator (Levers, Pulleys, Gears)Drag a lever’s fulcrum, lift loads with pulleys, mesh gear trains and bike gears, and compare inclines, screw jacks and wedges: force and efficiency.