Hello. I have two simple questions. 1) I don't understand atmospheric force. I read that it occurs by heaviness of air column and it act perpendicular to any surface. I can't imagine it. Where is the air column in experiment with glass and papper? Why the atmospheric force act perpendicular to any surface? 2) You have some plastic bottle and you make some holes to it. Than you remove the plug of the bottle. Now you see the springs of watter going on parabole down. Why? OK, i read if the plug is on the bottle, the atmospheric pressure is bigger than hydrostatic pressure, so watter don't go out from holles. However, if I remove the plug, hydrostatic pressure is bigger. Can you tell me why is bigger now?