Physics Calculators (Page 14)
Velocity, mechanics, energy, electricity and physics tools.
Sound Intensity Level Calculator
Enter sound intensity I to get the level in decibels β=10·log₁₀(I/I₀), with I₀=10⁻¹² W/m². Whisper 1e-10 → 20 dB; conversation 1e-6 → 60 dB; rock concert 1 → 120 dB.
Cyclotron Radius Calculator
Compute the gyroradius r = mv/(qB) of a charged particle in a magnetic field.
Lorentz Force Calculator
Enter charge, velocity, magnetic and electric fields to compute the Lorentz force F = q(E + v×B).
Hall Voltage Calculator (by Carrier Charge)
Compute Hall voltage including explicit carrier charge per carrier.
Parallel Axis Theorem Calculator
Enter moment of inertia about the center of mass, mass and distance to compute the moment about a parallel axis I = I_cm + m·d².
Drift Velocity Calculator
Enter conductivity σ, carrier density n and charge q to compute the drift velocity v = μE = σE/(nq) under an applied field E.
Fermi Energy Calculator
Enter carrier density and effective mass to compute the Fermi energy, wavevector, velocity and Fermi temperature of a free-electron gas.
Time Dilation Calculator
Enter velocity and proper time to compute the dilated time via Δt=γ·Δτ, γ=1/√(1−v²/c²). v=0.8c, Δτ=1 yr → Δt=1.667 yr (you age 1 yr, Earth sees 1.67 yr).
Rydberg Formula Calculator
Enter lower n₁, upper n₂ and nuclear charge Z to get the photon wavelength, frequency, energy and spectral series. H: n₁=2, n₂=3 → 656 nm (Balmer, red).
Speed of Sound Calculator
Compute the speed of sound in an ideal gas v=√(γ·R·T/M). Air: γ=1.4, M=0.02897, T=20°C → v≈343 m/s. Also outputs km/h, ft/s and time per km.
Doppler Shift Calculator
Enter source frequency, wave speed and relative velocities to compute the observed frequency, shift and wavelength via the Doppler effect.
Volume Thermal Expansion Calculator
First-order volume expansion for solids and liquids: V=V₀(1+β·ΔT). Common β: ethanol 1.12e-3/°C, water 0.21e-3/°C, steel 35.7e-6/°C, aluminum 69e-6/°C.