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chemistry
Calculate an Arrhenius rate constant, a second-temperature rate constant, activation energy, or pre-exponential factor and show the rearrangement used.
chemistry
Solve A = epsilon*c*l and convert between absorbance and transmittance while keeping units and model limits visible.
chemistry
Solve n*lambda = 2*d*sin(theta), including a guided conversion from an XRD 2-theta reading.
physics
Solve centripetal force, mass, speed, or radius from Fc = m*v^2/r with guided inputs and paginated results.
Use the integrated Clausius-Clapeyron relation to solve either pressure, either temperature, or enthalpy of vaporization.
physics
Solve electric force, either charge magnitude, or separation distance using Coulomb's law and identify attraction or repulsion when charge signs are known.
physics
Find final velocity from initial velocity, constant acceleration, and elapsed time using vf = vi + a*t.
chemistry
Calculate Delta G from Delta H, Delta S, and T or relate standard Gibbs energy to a dimensionless equilibrium constant.
Solve near-Earth gravitational potential energy, mass, or height from PE = m*g*h using g = 9.8 m/s^2.
Solve pH = pKa + log10([A-]/[HA]) and its pKa, ratio, conjugate-base, and weak-acid rearrangements.
Solve spring force, spring constant, displacement, or elastic potential energy with Hooke's law and PE = 0.5*k*x^2.
physics
Solve a selected constant-acceleration quantity from the available initial velocity, final velocity, acceleration, time, and displacement values.
Solve the Michaelis-Menten initial-rate equation for v0, Vmax, Km, substrate concentration, or fraction of Vmax.
chemistry
Find molarity by dividing moles of solute by liters of final solution: M = mol / L.
physics
Solve basic momentum, a missing final collision velocity, or the shared velocity of two objects that stick together.
chemistry
Calculate reaction or cell potential from E0, temperature, electron count, and reaction quotient using the general or 298 K Nernst form.
Solve force, mass, or acceleration from F = m*a with validated calculator inputs.
Calculate voltage, current, resistance, and electrical power from exactly two known nonnegative values.
Calculate de Broglie wavelength or momentum, a nonrelativistic electron wavelength, and hydrogenic Rydberg wavelengths and transition information.
geometry
Calculate a rectangle's area while showing the formula, accepting a user-chosen length unit, and labelling the squared result.
Solve gravitational force, either mass, or separation distance using Newton's law of universal gravitation.
Solve the van der Waals equation for pressure or temperature, compare with the ideal gas law, or rearrange for a or b.
physics
Solve work, kinetic energy, speed changes from net work, force, distance, or force angle with guided formulas.