What you see with your eyes is a form of energy. a. light b. heat c. chemical d. electrical

Light energy

You can't see heat from a stove or electric in a wire and chemical energy well you can't see the actual chemical compound of something can you but you can see actual light coming from the sun or a light bulb. and for proof just search light energy and it tells you directly.

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.