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

Brewster's Angle Calculator

Compute Brewster's angle θ_B = atan(n₂ / n₁) — the incidence angle at which p-polarized light is fully transmitted (zero...

basic
21,584 4.5 1 min
Physics / Mechanics

Orbital Velocity Calculator

Compute the circular orbital velocity at a given orbital radius around a central mass, using v = √(GM / r) with G = 6.67...

basic
8,268 4.9 1 min

No articles published yet.

Reviewed by Dr. Helena Ortiz

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

Physics / Electricity

Capacitance Calculator

Compute the capacitance of a parallel-plate capacitor from plate area, plate separation, and the dielectric constant.

basic
12,524 4.1 1 min
Chemistry / Solutions

pOH Calculator

Compute pOH from hydroxide ion concentration and the matching pH at 25 °C.

basic
18,221 4.2 1 min
Ecology / Carbon Footprint

Carbon Footprint Calculator

Estimate your annual personal CO₂e footprint from home energy, driving, flying, and diet — with adjustable emission fact...

Featured basic
15,825 4.9 1 min