# Services from physics-calc.x402tookit.com on Zero

> physics-calc.x402tookit.com serves 12 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/physics-calc.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/physics-calc.x402tookit.com/health.json

## Services

- [Special Relativity Calculator](https://www.zero.xyz/c/special-relativity-calculator-a110c3b9/llms.txt): $0.02/call via x402. Computes Lorentz factor, time dilation, length contraction, relativistic energy, and momentum for a given speed
- [Physics Calculators: Work, Energy & Power](https://www.zero.xyz/c/physics-calculators-work-energy-power-475bedb0/llms.txt): $0.02/call via x402. Calculates mechanical work (force × distance × cos θ), kinetic and potential energy, and power across multiple unit systems including joules, kWh, calories, and horsepower.
- [Physics Calculators – Block on Incline](https://www.zero.xyz/c/physics-calculators-block-on-incline-13baaf47/llms.txt): $0.02/call via x402. Calculates weight components, normal force, static friction limit, slip/no-slip verdict, acceleration, and slide time for a block on an inclined plane.
- [Physics Calculators: Orbital Mechanics](https://www.zero.xyz/c/physics-calculators-orbital-mechanics-176d9d62/llms.txt): $0.02/call via x402. Calculates circular orbit speed, escape speed, and orbital period at a given altitude or radius around the Sun, planets, the Moon, or a custom mass.
- [1D Collision Calculator](https://www.zero.xyz/c/1d-collision-calculator-c427cd64/llms.txt): $0.02/call via x402. Calculates post-collision velocities, momentum, and kinetic energy loss for a head-on collision between two masses with configurable restitution.
- [Physics Calculators – Kinematics (Constant-Acceleration Motion)](https://www.zero.xyz/c/physics-calculators-kinematics-constant-acceleration-motion-80790983/llms.txt): $0.02/call via x402. Solves constant-acceleration kinematics: given any three of displacement (s), initial velocity (u), final velocity (v), acceleration (a), and time (t), returns the remaining two unknowns.
- [Physics Calculators: Thin Lens & Mirror Equation](https://www.zero.xyz/c/physics-calculators-thin-lens-mirror-equation-d66a6df2/llms.txt): $0.02/call via x402. Solves the thin lens/mirror equation for the unknown quantity (focal length, object distance, or image distance) given the other two, and returns magnification plus image properties.
- [Physics Calculators: Pendulum & Spring Oscillator](https://www.zero.xyz/c/physics-calculators-pendulum-spring-oscillator-9afcf376/llms.txt): $0.02/call via x402. Computes the period and frequency of a simple pendulum (with exact large-angle correction) or a mass-spring system given physical parameters.
- [Physics Calculators: Wave Speed, Frequency, Wavelength & Doppler Shift](https://www.zero.xyz/c/physics-calculators-wave-speed-frequency-wavelength-doppler-shift-d0ccd6f3/llms.txt): $0.02/call via x402. Calculates wave speed, frequency, and wavelength relationships, plus Doppler-shifted frequency for sound (moving source or observer) or light (relativistic).
- [Physics Calculators: Projectile Motion](https://www.zero.xyz/c/physics-calculators-projectile-motion-8160657f/llms.txt): $0.02/call via x402. Calculates projectile motion parameters (range, max height, flight time, impact speed and angle) from launch speed, angle, height, and gravity, without air drag.
- [Snell's Law Refraction Calculator](https://www.zero.xyz/c/snell-s-law-refraction-calculator-cc653526/llms.txt): $0.02/call via x402. Calculates the refracted angle between two optical media using Snell's law, and checks for critical angle and total internal reflection.
- [Physics Calculators: Blackbody Radiation](https://www.zero.xyz/c/physics-calculators-blackbody-radiation-ca4e6dad/llms.txt): $0.02/call via x402. Calculates Wien peak wavelength/frequency, Stefan-Boltzmann radiant exitance, and total radiated power for a blackbody at a given temperature

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- [Zero catalog index](https://www.zero.xyz/llms.txt)