A temperature of 20°C is equal to ___f

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

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.

see earlier

measuring things 1 litre of water