;-:

in hooks law, f spring = k (triangle) x, what does the triangle and the x stand for

a. the distance the spring stretches

b. the elastic constant, a number at tells the relative strength of the spring

c. the constant of gravity

d. the amount of force acting on the spring

real, smaller and upside-down.   so the answer should be b.

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.