Ahall probe, consisting of a rectangular slab of current-carrying material, is calibrated by placing it in a known magnetic field of magnitude 0.15 t . when the field is oriented normal to the slab's rectangular face, a hall emf of 17 mv is measured across the slab's width. the probe is then placed in a magnetic field of unknown magnitude b, and a hall emf of 60 mv is measured. determine b assuming that the angle θ between the unknown field and the plane of the slab's rectangular face is

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.