In practice, most materials undergo a combination of these two effects.
Usually, the material cannot support combustion and must not undergo a certain loss of mass.
Also, the material is undergoing a range of tests that might challenge the preliminary analysis.
The material of any given story naturally undergoes several changes and adaptations during this process.
When the material undergoes a glass transition these losses reach a maximum.
Struck by such a "hammer," materials undergo chemical and physical changes impossible under normal conditions.
On magnetization a magnetic material undergoes changes in volume which are small - of the order 10-6.
What was found is that these materials underwent an insulating transition rather than a superconducting one.
Though previously packed down under high pressure, the materials used in its construction have undergone further shrinkage that is still continuing.
Because the materials usually arrive unsolicited and rarely undergo curriculum reviews, it is difficult to know how many teachers use them.