3) An object traveling at 4 m/s accelerates at a constant rate. After 5 seconds, the velocity is 19 m/s. What is the acceleration?
Hint: Use this equation and solve for acceleration: V = V; + at

not too sure thinking it will always be directed towards the centre of the earth. could be wrong not sure

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.