A skydriver of mass 80 kgs jumps out of a plane. (a) ignoring air resistance, draw a free body diagram with all forces acting on the sky driver.

(b) Now, suppose that the air resistance increases as the speed of the skydiver increases, draw
the forces acting on the skydiver 3 seconds later, assuming that the skydiver's acceleration is
1 m/sdownwards at this instance. (2 marks)

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.