A Spherical shell with radius 6 m centered at the origin. Charges Q1=-2nC, Q2=3nC, Q3=-9nC and Q4=2nC are located at positions (1,0,0), (5,-5,0), (2,2,-2) and (2,-1,0) respectively. The net flux through the sphere in (KN. m2/C) is:

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

thermal energy is the answer