Select all of the true statements. π is the area of a circle of radius 1
π is the area of a circle of diameter 1
π is the circumference of a circle of radius 1
π is the circumference of a circle of diameter 1
π is the constant of proportionality relating the diameter of a circle to its circumference
π is the constant of proportionality relating the radius of a circle to its area

b) phosphorus pentoxide

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

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.