The total mass of gas which fills a meteorogical balloon is 50kg. The balloon string is tied to a post which is fixed to the earth. Find the tension in the string the volume of the balloon is 110 metre cube and density of air is 1.3 kilogram per cubic metre

magnified images possible images can be real = projected onto a screen

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.

truck y has a greater velocity than truck x.