Pulling one of the balls away from the other. to pull a ball away, click on the ball and drag it. what happens to the force arrows between the two balls? what does this mean in terms of gravity?

On Plato.

When the distance between the balls increases, the size of the arrows decreases. This shows that the gravitational pull between the balls also decreases.

Explanation:

ice to water 1 water to vapour 2 latent heat

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.