The following force vectors act on an object: i) 55.0 newtons at 45.0° north of east and ii) 20.0 newtons at 30.0° south of east. which of the following represents the magnitude of the resultant and its angle relative to the easterly direction?

Explanation:

Let us assume

east as positive  

calculating the x components of each force:

F₁= 55 cos(45⁰)

   = 38.89 N

F₂= 20 cos (30)

   = 17.32 N

Y-components: (North is defined as positive)

 F₁= 55 sin(45⁰)

   = 38.89 N

F₂= -20 sin (30)

   = -10 N

resultant force in x-direction = 38.89 + 17.32

                                               = 56.21 N

resultant force in x-direction = 38.89 - 10

                                               = 28.89 N

magnitude

freezing

deposition

condensation

explanation;

melting also called fusion is the process where solid becomes liquid, sublimation is the process where solid becomes gaseous without first changing to liquid, deposition involves change from gaseous to solid state, freezing involves change from liquid to solid, boiling or evaporation involves change of liquid to gaseous state, while condensation is the change from gaseous state to liquid state.

endothermic reactions involves absorption of heat from the surroundings or the environment while exothermic reactions involves loss of heat energy to the surroundings.

in this case, sublimation, evaporation and melting are endothermic reactions (gain energy from the environment) while, freezing, deposition and condensation are exothermic (loss of energy to the surroundings) reactions.

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.