Btw this a 2 question test there will be 2 things to answer
william finds a piece of pure iron in his garden. after a few days, the iron begins to rust. what are the two types of substances involved in the rusting process of iron?
iron is
a a compound
b an element
c a mixture

with one kind of atom that combines with oxygen from the air to form rust (iron oxide). rust contains two types of atoms, which means it is
a a compound
b an element
c a mixture

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example

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.