Diffusion is the of particles from one region to another. It occurs because of two properties: the particles have between them and are able to . If we start off with two different particle types which are separated, and then the barrier which is separating them then will occur. The particles from both regions will and move in the spaces between other particles. The particles of each type will continue to mix until they are distributed. Diffusion can only happen with and because solid particles move around.

the answer is d

explanation:

dan realized that his goal of going to an ivy league school if only he works hard which means basically this   to become completely aware of (something) as a fact; understand without a doubt to make (something desired or anticipated) occur to give real, definite or physical form to a plan, dream, or goal to earn (money or a profit) from a deal

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards