A 30-kg child starts at the center of a playground merry-go-round that has a radius of 3.5 m and rotational inertia of 500 kg⋅m^2 and walks out to the edge. The merry-go-round has a rotational speed of 0.20 s^−1 when she is at the center. What is its rotational speed when she gets to the edge?

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.

no sign of dia of fuel cell

where’s the list ? the question is incomplete