Collection of Science Jokes P2

[DennisN]

 

[fresh_42]

Physicists might call it fusion barrier,
Archaeologists might think of petroglyphs,
Meteorologists might associate arid climate,
Biologists a desert habitat,
Astronomers have it simple as heavy stuff,
Experimental physicists criticize it for too much friction,
Engineers demand more primer,
Mathematicians might think of Markus,
Chemists name it Iron(II)- and Iron(III)-oxide,
Geologists understand sandstone,
but in the end it's all RUST.

 

[sysprog]

. . . Chemists name it Iron(II)- and Iron(III)-oxide,
Geologists understand sandstone,
but in the end it's all RUST. . . .

When we were 11-12-year-old kids in chem class (advanced placement) the Professor had us to collect rust for a thermite reaction $-$ he put some of our rust together with some purified iron oxide and some purified zinc dust in a crucible $-$ he used a shield, told us to not stare, started the reaction by lighting a little piece of magnesium ribbon that he'd stuck into the mixture, and holy heck, that stuff turned rust into liquid iron at over 2000 degrees Fahrenheit $-$ and it broke the crucible $\dots$

 

[BillTre]

 

[Keith_McClary]

turned rust into liquid iron

I've seen thermite welding on a transit rail on the street.
Two minute video:


No safety glasses!

 

[Jonathan Scott]

When we were 11-12-year-old kids in chem class (advanced placement) the Professor had us to collect rust for a thermite reaction $-$ he put some of our rust together with some purified iron oxide and some purified zinc dust in a crucible $-$ he used a shield, told us to not stare, started the reaction by lighting a little piece of magnesium ribbon that he'd stuck into the mixture, and holy heck, that stuff turned rust into liquid iron at over 2000 degrees Fahrenheit $-$ and it broke the crucible $\dots$

Near the end of my last chemistry class at school, the teacher demonstrated the thermite reaction in the yard, with such caution and keeping us so far back that we could barely see it, which was somewhat disappointing. We then went back inside and he demonstrated some other reaction (I don't remember what, but I think it also involved magnesium) on a tile on his front bench, which turned out to be much more spectacular. A blinding white cloud the size of a melon formed, started rolling up in the middle into a torus then rose vertically from the bench, passing straight through the overhead ceiling tile as if it did not exist, leaving a hole with charred edges with flickering light and hissing and crackling coming from inside for a few more seconds. At that point we were urged to leave the room very rapidly and various technicians started rushing around with fire extinguishers. I don't think any damage was done apart from the ceiling tile, but it was clear that the level of caution could have been better balanced between the two experiments!

 

[Keith_McClary]

some other reaction (I don't remember what, but I think it also involved magnesium)

 

[fresh_42]

What is this?

Spoiler

Euler-Maccheroni-Mascheroni Constant

 

[DrClaude]

 

[Keith_McClary]

Today's SMBC .
Sciencey, but politicalish, in a generic way.

 

[mfb]

The Fermi exclusion principle only applies to indistinguishable particles. If women and men cannot occupy the same state they must be indistinguishable.

Observations show that many men and women can be in the same state. Millions of them, in fact. They must be bosons.

 

[fresh_42]

They must be bosons.

Guess we still have to detect some really, really heavy stuff then.

 

[fresh_42]

 

[DrClaude]

https://www.smbc-comics.com/comic/scalars

 

[DennisN]

 

[Borg]

View attachment 276740

And the other one is put into the ground?

 

[jack action]

 

[fresh_42]

View attachment 277029​

That only happens because all the exercises started with: friction, and air resistance will be neglected.

 

[Borg]

I'm sure that he won't be ignoring friction when he hits the ground.

 

[DrGreg]

I wonder if the cartoonist was

• correctly thinking of air resistance, or
• incorrectly thinking that all objects fall vertically downwards regardless of initial horizontal velocity?

 

[jbriggs444]

Air resistance is negligible given the depiction of the other person's hair braids and the lack of ripples on the water.

How fast would a guy be driving on a one lane paved road anyway, one wonders.

 

[fresh_42]

Air resistance is negligible given the depiction of the other person's hair braids and the lack of ripples on the water.

Hidden assumptions: a) the hair is not otherwise fixed and b) water.

 

[sysprog]

Excuse for doing Physics without Mathematics

 

[jack action]

 

[Keith_McClary]

Did we already have this? (Cartoon too tall to post.)

You Want to See My Data? I Thought We Were Friends!
Posted By Stuart Ritchie & Zach Weinersmith on Jul 29, 2020

Also, today's SMBC.

 

[jack action]

Reading the link from the previous post, saw this T-shirt for sale:

 

[jack action]

 

[fresh_42]

 

[DrClaude]

 

[DaveC426913]

View attachment 277209

I don't get it.