>>14384641its just notation.
here a quantity E_total is computed by adding its individual components E_i (of which a number of i exist).
here i is an integer which keeps tracks about which E_i you are talking about.
for example for two components the equations is short for E_total=E_1+E_2
>>14384759>E means energybrainlet notation cultist take
>interaction is neglectedhow do you come to this (wrong) conclusion. if E would refer to energy (which it might nt) you only neglect the energy transfer between the total system and its surrounding. the individual system can still transfer energy between each other
