Amajor motor company displays a die-cast model of its first automobile, made from 9.00kg of iron. to celebrate its hundredth year in business, a worker will recast the model in gold from the original dies. what mass of gold is needed to make the new model? the density of iron is 7.86 ✕ 10^3 kg/m3, and that of gold is 19.30 ✕ 10^3 kg/m3

22.10 kg

Explanation:

The worker wants to recast the model from iron to gold, so the volume of the model made of iron and made of gold will be the same:

the volume of each model can be rewritten as the ratio between the mass of the model, m, and the density of the material, d:

so we can rewrite the first equation as

where we have

is the mass of the model in iron

is the density of iron

is the mass of gold needed

is the density of gold

Solving for , we find

are you like autistic or something?

xd

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.