That doesn't help. I can easily keep a couple cc of fluid in my mouth without puffing my cheeks out like a hamster, and it doesn't matter if we're in water or air. The problems are that
I was hoping that you would allow your logic to go with this. It would help if you give it some serious thought.
Whether you kept the water in your mouth and tried your best to not look like a hamster, you're still adding that water which is under pressure and if you don't release it, you don't push the plunger in the other side as you still have that pressure in your mouth pushing back into the straw. Can you see what I'm saying?
1) air from a small cylinder that goes in the open atmosphere equalizes there, and any change in pressure in the area is going to be so ludicrously small that it's not even measurable, let alone strong enough to lift any object even if the rise in ambient pressure could to that in the first place
Any air you suck from a cylinder....Ok let's use a bottle with the top off. You suck on that bottle and the air you suck out goes into the atmosphere as pressure back towards the bottle top but your tiongue is in the way and creating a seal, so it tries to push past your tongue.
Basically it's trying to push your tongue into the bottle until it can equalise that pressure you took from it. Action and equal and opposite reaction.
2) only a specific item is lifted by a rise in local ambient pressure and there is no reason why that should happen, why won't other objects go up
If you don't apply energy, then nothing can be pushed up.
3) plunger also rises when the air removed from cylinder is drawn into a rigid container so it has no effect on ambient pressure
You'll have to expand on this because I'm not quite sure what you mean. Plus, you are now making understanding it hard for yourself when you were starting to grasp it. Maybe you don;t want to grasp it.
More practical problems in earlier posts that you have ignored, in case you want to address them.
This is now telling me what yo7ur goal is. You're close to going in the bin.
Do you realize that your response to silhouette did not answer his question on why there is a higher pressure at lower elevation? You just said that that's how it is.
No more need to reply, you're binned. People like you aren't inetrested in understanding and I'm not wasting another second on you.