What is the boy's power output if he climbs the stairs in 12.6 s
**Plzzz help**

b would be the answer

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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.

momentum of soft ball three times less than baskey ball