A straight line on a (*) stress-strain curve is a consequence of this equation.
A potential derived from this law predicts energy quantized by half-integer multiples of Planck's constant time frequency. This equation predicts the energy required for an IR-active mode given the reduced mass of a molecule. In the most common test on an Instron device, this aw fails to predict behavior like work hardening or necking as the load increases. This equation models chemical bond vibrations with a quadratic potential energy dependence. A straight line on a (*) stress-strain curve is a consequence of this equation. It uses a proportionality constant which has units of Newtons divided by meters. This law predict a restoring force that is negative and proportional to the distance extended from equilibrium. For 10 points, name this law which applies. 
A potential derived from this law predicts energy quantized by half-integer multiples of Planck's constant time frequency.
Hooke's Law