A physics student pushed a 50 kg box across the floor, accelerating it at a rate of 1.5 m/s^2. How much applied force was acting on the box of the frictional force was 25 N? Determine the new acceleration of the box if the mass was doubled? Draw a system schema and FBD for this situation and then determine all forces from your FBD. Please somebody actually help!

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.

i believe the answer is electric potential.

explanation: