Dr. Helena Ortiz
Featured contributor PhD Applied Physics; former research associate at a national metrology lab.

Dr. Helena Ortiz

Senior Reviewer, Science & Engineering

0 calculators 0 articles Member since Jun 2026
Physics / Mechanics

Time Dilation Calculator

Compute the dilated time observed in a stationary frame for a moving clock, given the proper time and the speed as a fra...

Basic
23,440 4.9 1 min

No articles published yet.

Reviewed by Dr. Helena Ortiz

These calculators were technically reviewed by Dr. Helena Ortiz for accuracy.

Chemistry / Solutions

Gas Density Calculator

Compute the density of an ideal gas at given pressure and temperature from its molar mass, using ρ = PM/(RT).

Basic
4,981 4.2 1 min
Physics / Electricity

Current Divider Calculator

Compute the current through one branch of a two-resistor parallel current divider from the total source current.

Basic
13,508 4.7 1 min
Physics / Mechanics

Velocity Calculator

Compute velocity from displacement and time, or solve for either one given the other two.

Basic
20,035 4.1 1 min