PHY.5:8 - Common Anti-Patterns and How to Avoid Them

Misstep exposed by the construction	Consequence	Repair
Delete a fast part and its coupling together	The motor loses the torque and damping supplied by its adjusting current.	Substitute the part’s response into the retained interaction.
Apply the settled response at every instant	The initial current and switching response disappear.	Carry the transient and propagate its effect into the requested output.
Match one propagation speed and assume the other matches	A continuum approximation can misstate the arrival of a wave packet.	Compare the dispersion and the output the disturbance uses.
Replace unresolved motion by its mean	The Brownian particle loses its displacement spread.	Retain the fluctuation contribution when the question uses that distribution.
Use a successful position reduction for a thermodynamic observable	A limiting position process can omit entropy production.	Reduce the observable and its physical exchanges with the dynamics.