A proton that is moving north at 7.5 x 107 m/s encounters a uniform magnetic field of 4.5 T directed east. What are the magnitude and direction of the force acting on the proton?

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

c) up

hope this

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.