Hand inside vacuum chamber experiment - GIF

**Altair** · Feb 13, 2022, 07:13 PM

Hand inside vacuum chamber experiment.

Previously:

World's largest vacuum chamber - photo
Dropping a feather and metal cube in a vacuum - GIF
Controlled vacuum collapse of rail car - GIF
Manure vacuum truck - video
Vacuum packing a sea urchin - GIF

**schuylergrace** · Feb 14, 2022, 10:37 PM

Wow. I hope nobody asks him what would happen if he put his head in a vacuum chamber.

**nova_robotics** · Feb 15, 2022, 12:00 AM

Originally Posted by schuylergrace

Wow. I hope nobody asks him what would happen if he put his head in a vacuum chamber.

His name is James Orgill and he has a PhD in chemical engineering. His voice is annoying as hell, but he's super smart and his Youtube channel is top shelf.

https://www.youtube.com/c/TheActionLab/featured

**schuylergrace** · Feb 15, 2022, 12:24 AM

I clicked over to his channel and realized I have seen a couple of his videos. Still, degrees notwithstanding, I would not have done that to the point he seemed to. I don't know how much vacuum he pulled, but I was envisioning tiny embolisms all through his hand and forearm. I just watched the video this GIF came from, and I'm still not convinced it was a good idea.

**bob47907** · Feb 15, 2022, 08:32 AM

Notwithstanding the very real risk of Compartment Syndrome.

http://en.m.wikipedia.org/wiki/Compartment_syndrome

**Frank S** · Feb 15, 2022, 06:02 AM

Originally Posted by nova_robotics

His name is James Orgill and he has a PhD in chemical engineering. His voice is annoying as hell, but he's super smart and his Youtube channel is top shelf.

https://www.youtube.com/c/TheActionLab/featured

Many of the older generation people would have learned about the hazards of having your body subjected to both negative and positive pressures during science classes in school, through the demonstrations of placing objects such as grapes apples bananas or small cuts of meat in clear chambers then have the air pumped out or the pressure increased, while the teacher explained what was happening to the objects as they were going through the transformations.
I remember seeing such demonstrations in my earlier years in schools maybe in grade 5,6 or 7 and for sure in science and chemistry lab in high school. However, I was in school back during the Mercury, Gemini and Appolo era.
I highly suspect the practice of classroom demonstrations such as these may have fallen out of the educational curriculum for later generations.

**bruce.desertrat** · Feb 19, 2022, 09:45 PM

My 7th grade science teacher taught us the rule about "Add Acid To Water" quite graphically. He had a large Pyrex beaker (5 or 6 liter) with about a liter of Sulfuric Acid into which he poured about 250ml of water. The contents immediately started boiling vigorously. He took the beaker to the back of the class and stuck it in the big heavy sink, then came back up front and started talking about more of the subject. At the end of the class he said "I want to show you something"

He went back and picked up the beaker.

Still steaming .

That firmly fixed that rule in my head!

**mklotz** · Feb 20, 2022, 08:39 AM

Originally Posted by bruce.desertrat

My 7th grade science teacher taught us the rule about "Add Acid To Water" quite graphically. He had a large Pyrex beaker (5 or 6 liter) with about a liter of Sulfuric Acid into which he poured about 250ml of water. The contents immediately started boiling vigorously. He took the beaker to the back of the class and stuck it in the big heavy sink, then came back up front and started talking about more of the subject. At the end of the class he said "I want to show you something"

He went back and picked up the beaker.

Still steaming .

That firmly fixed that rule in my head!

The mnemonic helps me to remember

Add acid to water
Like a fellow oughter

**Bony** · Feb 15, 2022, 12:13 AM

I think a hand operated vacuum pump is one of the devices used to assist sufferers of erectile dysfunction. Just in case you want to know!

**schuylergrace** · Feb 15, 2022, 12:34 PM

I also have a problem with him and others calling such things "experiments." They aren't experiments, but demonstrations. We know what is going to happen--well, some of us do, and the rest could just look it up. An experiment implies the answer isn't known or hasn't been confirmed (as in checking another's work for repeatability). But anything you do on the Interwebs that's outrageous and science-y is an "experiment" these days.