A sample of an unknown material weighs 300 N in air and only 200 N when submerged in an alcohol solution with a density of 0.70 x 103 kg/m3 . What is the force due to gravitational acceleration? What direction does this force act?
What is the magnitude of the buoyant force? What direction does this force act?
What is the density of the unknown material?

15.3 cos 65 degrees trig

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

gas and liquid

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it