A 0.5-kg ball with a total mechanical energy of 250 J is rolling down a hill. Using the law of conservation of energy, complete the following chart by calculating the missing variables. AI A Aa X2 Ω All x? 6 B Potential Energy (J) Kinetic Energy (J) Velocity (m/s) 250 0 125 125 9.75 31 31.6 250

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.

answer and explanation;

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation: