1. a venturi measures flow rate using a pressure comparison between the outside and inside of a pipe.
a)true
b)false

2. an inflated balloon’s shape is determined by internal pressure and external atmospheric pressure.
a)true
b)false

it doesn't. it was imagined up in the middle ages.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.