3. The net force exerted by a woodpecker's head when its beak strikes a tree can be as large as 4.90 N, assuming that the bird's head has a mass of 50.0 g.
Assume that two different muscles pull the woodpecker's head forward and
downward, exerting a net force of 4.90 N. If the forces exerted by the muscles
are at right angles to each other and the muscle that pulls the woodpecker's
head downward exerts a force of 1.70 N, what is the magnitude of the force
exerted by the other muscle? Draw a free-body diagram showing the forces
acting on the woodpecker's head.

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.

reserve is the answer

this would be about 43%