True or false:
all electromagnetic radiation can travel through empty space, and travels at the same speed.

True

Explanation: Electromagnetic radiation travels in the form of waves, and while it can travel in a medium, electromagnetic waves actually do not need a medium to travel.

And one of the principles in the physics is that all electromagnetic waves travel at the speed of light, c, in a vacuum, so all electromagnetic waves travel at the same speed in a vacuum (not in materials, different waves can travel at different speeds in some materials), so this is true.

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.