Occurs when the relative humidity is 100%.

"Saturation" occurs when the relative humidity is 100%.

Humidity discloses to you the moisture content of the climate, or how much water vapor there is noticeable all around. At the point when the humidity is high it feels onerous outside in light of the fact that perspiration doesn't vanish and give cooling. At the point when the humidity is low you feel cooler, yet your skin dries out and you get dried out more effortlessly on the grounds that more dampness is being vanished from your body.  

Relative humidity is given as a rate. This rate reveals to you how close the air is to being saturated. On the off chance that the relative humidity is 100%, the air is saturated.

that would be b i just took the test : )

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.