At time t=1s, what will be the displacement δy at point x=2.5m?

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

b.a device that inputs heat into a cool object

no sign of dia of fuel cell

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.