Acar goes around a curve at 20. m/s. if the radius of the curve is 50 m, what is the centripetal acceleration of the car? *

Given that,

Velocity , V = 20 m/s

Radius of curve, r = 50 m

Centripetal acceleration, ac = ?

since,

ac = V²/ r

ac = 20²/50

ac = 8 m/s²

The centripetal acceleration of car is 8 m/s².

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.