Physics Calculators (Page 15)
Velocity, mechanics, energy, electricity and physics tools.
Characteristic Acoustic Impedance Calculator
Compute acoustic impedance Z = ρc and reflection/transmission at a boundary.
Lens Maker's Equation Calculator
Compute focal length from refractive index and surface radii (1/f = (n−1)(1/R₁−1/R₂)).
Acoustic Intensity & Power Calculator
Compute sound intensity, intensity level and pressure level from RMS pressure.
Damped Harmonic Oscillator Calculator
Compute damping ratio, natural/damped frequency and Q of a damped oscillator.
Torsional Shear Stress Calculator
Enter torque, diameter, length and shear modulus to compute max shear stress τ_max=16T/(πd³), twist angle θ=TL/(GJ) and polar moment J=πd⁴/32. T=100 N·m, d=0.02 m → τ_max≈63.7 MPa, θ≈1.14°.
Large-Angle Pendulum Calculator
Enter length, gravity and initial angle to compute the exact large-angle period via the complete elliptic integral T=4√(L/g)·K(sin(θ₀/2)), the small-angle period and the % increase. L=1, θ₀=90° → T=18.6% longer than small-angle; θ₀=20° → +1.4%.
Acoustic Decibels & Damping Calculator
Compute decibel change and distance attenuation of sound intensity.
Bernoulli Pressure-Head Calculator
Compute pressure difference and heads from velocity/height changes (Bernoulli).
Reynolds Number Calculator
Enter density, velocity, diameter and viscosity to compute Reynolds number Re=ρvD/μ and the flow regime. Water ρ=1000, v=1, D=0.05, μ=0.001 → Re=50000 (turbulent).
Poiseuille Flow Rate Calculator
Enter tube radius, pressure difference, viscosity and length to compute the volumetric flow rate Q = π·r⁴·Δp/(8·η·L).
Stokes' Law Drag Calculator
Enter the sphere radius, velocity and fluid viscosity to compute the viscous drag from F=6πηrv, plus the terminal velocity v_t=2r²Δρg/(9η).
Capillary Rise Calculator
Enter surface tension, density, tube radius and contact angle to compute capillary rise from h=2γcosθ/(ρgr) and the Laplace pressure ΔP=2γ/r.