Explain, in terms of impulse and momentum, how airbags help avoid injury in a car crash?

Explanation:

Impulse is the change in momentum.  It is also equal to the average force times the change in time.

J = Δp

F Δt = m Δv

The change in momentum is a fixed number; your mass, initial velocity, and final velocity are constant.

F Δt = k

So force and time are inversely proportional.  What this means is, we can either have a large force over a short period of time, or a small force over a long period of time.

Obviously, we want a small force over a long period of time.  Without airbags, your head would hit the steering wheel very quickly.  With airbags, your head has time to decelerate, so there's less force.

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.