question: What is it called when the rest mass of individual particles is destroyed but the inertia equivalent of the system of the two particles remains ?
answer: electron -- positron annihilation
turker_answer: When the rest mass of individual particles is destroyed but the inertia equivalent of the system of the two particles remains is called electron-positron annihilation .
rule-based: It is called electron -- positron annihilation when the rest mass of individual particles is destroyed but the inertia equivalent of the system of the two particles remains .