Sucking down on this cone makes it rise, and Feynman sprinkler

Maybe, the low pressure caused by the air bending around the upper edges of the straight pipe is pulling it up ?

In the late 70s as I was preparing to leave home for 4 years at Canoe U. and then on to a life in fighter jets. Some High School and Hockey buddies decided we should all go camping. Knowing the trouble this could be I drove myself. Just before Priest Grade outside Yosemite I stopped at a Gas Station/Mini-Mart. I noticed the old brown van ,that was the only other vehicle in the gravel lot, had a bunch of white squares all the way around the van under the window line. Each square had a Feynman diagram. A lady came out carrying bags of groceries and fumbling with her keys. I offered to take at least one of her bags and she handed me one and unlocked her door. As I handed her the bag I asked why she had Feynman diagrams all around her van? She responded, “well, I am Mrs. Feynman”. About that time, her husband came out the door carrying 2 more bags, which he too handed one to me. Then after adjusting his gear took the bag, turned around and said “Tanks”. (Not a typo). She then presented her husband with my question, to which he responded, “Hi, I’m Mrs. Feynman’s husband. Call me Richard”. I responded “Call me Richard, too”. We talked about 10 minutes, he asked Me lots of questions. I attended one of his lectures a few years later. He remembered me, told the Navy Brass I was one of the best helpers he’d ever had. I got an A in Physics that year.

I recently read, "Surely You're Joking, Mr. Feynman!" A wonderful book I recommend to all. Great video, Matthias!

Matthias, you're an absolute gem.

Unfortunately, the comments are so full of random guesses, its hard to figure out which is right -- but I did figure it out in the end.

I love the curiosity you have combined with your determination to measure and explore truth. Wonderful!

Man, I love engineers!

Just loving the direction this channel takes. Popularisation of science. Thanks !

Fascinating. Fluid dynamics is (are?) amazing.

I always enjoy the rabbit holes!! Thank you Matthias.

Fascinating.

This explains how to repel black holes with a simple vacuum cleaner. Thanks.

Best. Video. Ever. The Feynman sprinkler. Yay.

Now you've got me thinking about what the possible applications are for this.

Fluid dynamic master class :)

This is so interesting. I'm a mathematics graduate but I've always been fascinated by physics. I especially love seeing physical experiments with surprising results. Thank you for the video! I really enjoyed it.

All very curious. Interesting stuff.

Watched your videos as a teenager. Loved your approach to building bandsaws. Now I’m 30 and just stumbling upon your videos again. I’m glad to see you still making the awesome videos you make. Inspirational.

Good ole Bernoulli. Explains so much

This is what the internet is for! Thank you.