Suction seems real to me
No.14256830 ViewReplyOriginalReport
Quoted By: >>14257450 >>14257461 >>14258239 >>14258259 >>14258290
So i made this device out of drinking straws.
When i suck at it at a, i can place a thin paper piece on b or c and it will stick.
If i blow on a it it will push the paper away on c or b.
According to the "official" explanation when i suck on it there is subpressure inside the straw and the air around the openings push the paper onto the tube. However, consider this:
Both in the blow example and the suck case there is simply air blowing past the bottom of the upstanding pipe. In both cases there is less pressure at one of the horizontal end points. So what is the difference? The sucktion and blowing!
To reiterate. If i suck on a, there is subpressure at a. If i blow on a, there is subpressure at b. If vacuum didnt have any "suction power" you should see air getting sucked in from blowing on a because there is less pressure when the air is moving past the tower!
When i suck at it at a, i can place a thin paper piece on b or c and it will stick.
If i blow on a it it will push the paper away on c or b.
According to the "official" explanation when i suck on it there is subpressure inside the straw and the air around the openings push the paper onto the tube. However, consider this:
Both in the blow example and the suck case there is simply air blowing past the bottom of the upstanding pipe. In both cases there is less pressure at one of the horizontal end points. So what is the difference? The sucktion and blowing!
To reiterate. If i suck on a, there is subpressure at a. If i blow on a, there is subpressure at b. If vacuum didnt have any "suction power" you should see air getting sucked in from blowing on a because there is less pressure when the air is moving past the tower!
