When a molecule absorbs ir eletromagnetic energy, what are the vibrational modes affected?

Stretching vibration and bending vibration

Explanation:

1. Stretching vibration results in the variation of the bond length. There are two types of stretching vibration:

2. Bending vibration results in the variation of the bond angle.

These can be grouped into 4 types:

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.

i think the answer is a, hope this : )