An object falls for 2 seconds after being dropped from rest. Its velocity is:

V = 19.62 [m/s]

Explanation:

To solve this problem we must use the following equation of kinematics:

where:

V = final velocity [m/s]

Vo = initial velocity = 0

g = gravity acceleration = 9.81 [m/s²]

t = time = 2 [s]

V = 0 + (9.81*2)

V = 19.62 [m/s]

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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.