Explained: 5 Fun Physics Phenomena

For more on deflecting polar streams with electric fields, see:

I'm in Hobart for a live show on Friday at UTAS followed by gigs in Sydney and Canberra next weekend.

[i_like_Peanuts]

That spinning smartphone short will probably do numbers for this video lol

[zgaurd]

Damn it's from a video 9 years ago

[kmoyo]

Here i am thinking “lol he is using an older IPhone so he wouldn’t break a newer one trying this experiment” then I clicked on the video and it’s 9 years old…

[adarshguptak]

Placing a grid behind to show the reflection of the depression is simply ingenious! Keep it up, Derek!

[nomasan]

It causes a depression in the water...


I'm here for you water 😢

[shubhamraj]

Absolutely amazing the second experiment that you have explained with stick was asked in JEE Advanced 2020 Physics paper the exact same question but with a ruler not stick.

[sadclownairraid]

1. Get a boat
2. Get a long rod and attach it to the nose of the boat
3. Attach a huge magnet to the end of it really close to the water
4. Go to a lake and forever ride the concaving water.

[markrempel]

I did the deflecting water experiment with deionized water. The same effect was observed which leads me to believe that ions were not the cause for the deflection

[RaindropsBleeding]

The physics behind the teabag rocket helps explain something that happened in Avatar: The Last Airbender and I love the creators of that show for paying attention to this.
During "The Boiling Rock" Sokka and Zuko flew over a boiling lake in a hot air balloon. Once the balloon passed over the lake, it began to plummet, due to there no longer being any cool air beneath it to push up on the hot air inside. The temperature inside and outside was the same, so gravity won.

[Thunderft]

it aint movement of ions as drawn in your animation at 4.25!
1) ions move incredibly slowly in water, even in high electric fields.  Their movement is certainly insignificant compared to the water flow.
2) as drawn at 4.25, you end with MACROSCOPIC charge separation!!!.... eV per particle type energies
3) as drawn it violates conservation of energy. (charge separation at the end).

subtle phenomena like this can be tricky to describe.... but the above observations make me uncomfortable with the one given here.

[airyballoon]

"Its not procrastination when I'm learning..."

[dan]

I'm disappointed in Youtube that it seems I've missed so many uploads from your channel. Your channel is one of my favourite, so it seems odd that I didn't see them pop up in my subscription feed.

[ACSReactions]

Love the animation on top of the broll. We need to do more of that! Really great explanations. Thanks!

[WoundedEgo]

Atom #1: "I lost an electron!"
Atom #2: "Are you sure?"
Atom #1: "I'm positive!"

[apinakapinastorba]

Apple logo blurred. Now no one can guess what phone that is.

[MarkKim]

I showed my chemistry teacher this video, and he used distilled water for the demo around 4:00. The distilled water was still attracted to a charged metal ruler. Moreover, he also tried the demo with Hexane, which is nonpolar, and this was not attracted to the ruler at all. Despite your effort to break the misconception, the theory taught in chemistry classrooms still stands. 

[esanman]

I am from Nepal. Students here are only memorizing definitions written in textbooks. They are not using to explain the real situation. Even our teachers are not good at explaining the real world. People like you Helps us to change the way of thinking and How must be thought about something. I am really proud of you. I love you so much.

[sebyiuga]

For some reason this video made me really REALLY happy, more so than Veritasium videos usually do. I guess it's just the wonderful experience of learning new things from a guy with a smile on his face. I feel like I should thank you more, Derek, so on behalf of all of us, I think I can say:

Thank you. Thank you so much.

[wahgs]

The common phrase, "Hot air rises, " should become "Hotter air rises."

[Bunny-prgw]

I'm actually shocked that there is only one comment re: Thunderfoot's debunking of this. I'm not really a fan of Thunderfoot's "HAAHH GOTY" approach, but as a supporter of science, Veritasium should acknowledge it, thank Thunderfoot, and make a new video praising the scientific method and showing his viewers what he got wrong, because that is what science is about. Falsifiability and improving. Not ignoring when you've got something wrong. Making an update on a 7 year old video would show integrity and attract new viewers.