Physics Calculators (Page 21)
Velocity, mechanics, energy, electricity and physics tools.
Poisson's Ratio Calculator
Enter axial and lateral strain to compute Poisson's ratio ν = −ε_lateral/ε_axial, plus shear modulus and Young's modulus.
Newton's Law of Cooling Calculator
Enter initial temperature, environment temperature, cooling constant and time to compute the temperature T(t)=T_env+(T₀-T_env)·e^(-kt).
Heat Transfer Coefficient Calculator
Compute heat transfer Q = h·A·ΔT and thermal resistance.
Thermal Stress Calculator
Enter Young's modulus E, expansion coefficient α and temperature change ΔT to compute thermal stress σ=E·α·ΔT. E=200 GPa, α=12e-6/K, ΔT=50 K → σ=120 MPa, ΔL=6e-4 m.
Magnetic Permeability Calculator
Enter magnetic flux density B and field strength H to compute permeability μ = B/H, relative permeability and susceptibility.
Relative Permittivity Calculator
Enter capacitance, plate area and spacing to compute relative permittivity εr=C·d/(ε₀·A), absolute ε and C/C₀. Vacuum C=8.854e-11 F → εr=1; water-filled C=7.08e-9 F → εr≈80.
Work Function Calculator
Enter photon wavelength λ and maximum photoelectron kinetic energy KE to compute work function φ=hc/λ−KE and threshold frequency ν0=φ/h. Na λ=400nm, KE=0.82eV → φ≈2.28eV, λ₀≈544nm; W λ=200nm, KE=1.7eV → φ≈4.5eV.
Hall Coefficient Calculator
Compute the Hall coefficient R_H = V·t/(I·B) and carrier density.
Thermionic Emission Calculator
Enter cathode temperature T and work function W to compute emission current density J=A·T²·exp(-W/kT). Tungsten W=4.5 eV, T=2500 K → J≈6369 A/m²; Richardson A=1.2×10⁶ A/(m²·K²).
Inductor Energy Calculator
Enter inductance and current to compute the magnetic energy stored in an inductor E = ½·L·I².
LC Resonance Frequency Calculator
Compute the LC resonant frequency f = 1/(2π√LC).
RL Time Constant Calculator
Enter inductance and resistance to compute the RL time constant τ=L/R. L=0.1 H, R=100 Ω → τ=1 ms.