Slightly Scientific Thoughts

vaguely scientific things and silly pictures. Primary interests : chemistry, mathematics, and physics.

[chemixtremist]

What:They studied data collected by theAtacama Large Millimeter/submillimeter Array (ALMA) on a distant galaxy and determined that the milimeter wavelength emission band collected was originally an infrared band associated with oxygen. MACS1149-JD1 is 13.28 billion light years away.

Why is this interesting:This is the furthest distance we’ve detected such a precise measurement of oxygen. Oxygen is ionized during star formation, so if we detect emission bands of oxygen we can determine when those stars were formed.

[thehikingastronomer]

Physics Time Part 2!

Last time, we saw what happens when you let light through a door that is alllllllllllmost closed. You either get something like this….

Or you get something absolutely awesome like this (courtesy @star-gazing-knight)

But what happens when you put a magnifying glass in front of it?

Woah. Even though the door is closed, you can see ALL of the light bulbs and their reflections (and the one light bulb that is out!)

Here’s an even cooler picture, where you can clearly see the burnt light bulb.

Neat, huh?

Watch the full video below to see some more demonstrations, and learn why the Sun doesn’t focus to a single point in our eyes!

Don’t forget to subscribe! And follow me on Snapchat, Twitter, and Instagram @thescalex

[chemixtremist]

mindblowing, I knew digital editing was advanced, but this is beyond where I thought it was. If someone can semi casually do this...will actors even need to go to set? Everyone can be a no name body double

[chemixtremist]

I’m surprised this escalated beyond the professor googling just to double check. Can you "fail" a student for getting a single answer wrong? I think the student in question may not have had the strongest grasp of the other material.

[onlinecounsellingcollege]

Be alone. Eat alone, take yourself on dates, sleep alone. In the midst of this you will learn about yourself. You will grow, you will learn what inspires you. You will cultivate your own dreams, your own beliefs, your own stunning clarity. And when you do meet the right person who makes your cells dance, you will be sure of it because you are sure of yourself.

Bianca Sparacino (via onlinecounsellingcollege)

[chemixtremist]

I was working on a new breadboard for a couple hours last night, I think I have blisters from pressing in the jumpers into the stiff pinholes.

[chemixtremist]

"A solid surface, oscillating up and down, can launch a soft, wobbly ball into the air at higher speed than it would launch a hard ball of the same mass. That’s the surprising conclusion of a study by researchers in France, who demonstrate that a kind of synchronization between the internal vibration of a projectile and the frequency of the rising and falling surface can more than double the projectile’s kinetic energy. The phenomenon could have applications in ballistics or in microfluidic technology."

[chemixtremist]

How do my fellow scientists keep up with the latest news?

I recently started using Newsify to aggregate and read at least the abstracts from journals I find interesting, but I always feel like I'm missing the big picture. I no longer follow science reporters like sciencedaily, too much misinformation.

[chemixtremist]

One of these days I'd like to build a cnc autopipet. At the very least an xyz router with a pipetting arm. I fantasized about it a lot when i was doing low-air crystallization preps, hundreds of tiny little aliquots of different reagents into tiny little wells. Every time I'd lose count somewhere and have to write some sad comment in my notebook so if half the batch failed, I knew why. Pipetting is such a monotonous task, if you're not doing just a small experiment, it seems silly not to automate the whole thing.

[chemixtremist]

So I feel like a bot right now, but I really like this iphone game. It's called Tchisla, and the point of the game is to represent one number entirely with another integer, using any math operators you want. You can also use the representative integer as digits, so for example 22 using 1's, you could do 11+11 It's silly but I like it

[chemixtremist]

https://betterexplained.com/articles/an-interactive-guide-to-the-fourier-transform/

[mathprofessorquotes]

What do we do when we encounter double integrals? First, we cry. When we are done crying, we solve.

Multivariable calculus professor (via

mathprofessorquotes

)

when we are done crying, we solve

(via neednothavehappenedtobetrue)

ACCURATE

(via eliza-was-here)

[scishow]

[scientiflix]

ASMR: That Happy, Tingly Feeling

by scishow:

Hundreds of thousands of people get a tingling sensation, called ASMR, from things like whispering or personal attention. Here’s what science has to say about it.

Hosted by: Hank Green

Sources:

Autonomous Sensory Meridian Response (ASMR): a flow-like mental state

Rustle, Tingle, Relax: The Compelling World of A.S.M.R.

Part 3: The first peer-reviewed publication about ASMR: Meaning of the data & next steps.

A whisper, then tingles, then 87 million YouTube views: Meet the star of ASMR

Support SciShow on Patreon

[badsciencejokes]

A:“Knock knock.”

B:“Who’s there?”

A:“Interrupting coefficient of friction.”

B:“Interrupting coeffici-”

A:“μ!!!!!”

[fystudying]

OMG

[scienceisbeauty]

Quantum-dot spectrometer is small enough to function within a smartphone.

Via Phys.org

Instruments that measure the properties of light, known as spectrometers, are widely used in physical, chemical, and biological research. These devices are usually too large to be portable, but MIT scientists have now shown they can create spectrometers small enough to fit inside a smartphone camera, using tiny semiconductor nanoparticles called quantum dots.

[matan-matika]

Eigenvectors

A linear transformation T that stays in the same vector space could have some points that stay relatively fixed. A fixed vector v would have T(v)=v. Many transformations only have the 0 vector as their only fixed point.

But, what happens in a lot is that there are certain vectors that get scaled by the transformation. That is, there exists a scalar λ such that T(v)= λv. Since all scalars are unaffected by T, this same λ works for all scalings of v. If v has this property, it is an eigenvector for T, and λ is an eigenvalue.

A transformation can have multiple independent eigenvectors.

Another cool property is that if λ is less than 1, then T repels vectors from v, and if λ is greater than 1, then it attracts T.

[thousandmaths]

I, um,

I like to post my own content on this site; I don’t reblog a lot and that’s intentional. So after the signal boost on Monday I feel a little weird advertising another blog.

However.

@matan-matika is puting out high quality posts with rhul nice illustrations and I think you should be following this blog mkai?

[sweater-vest]

What the fuck is an eigenvalue?

Georgia Tech Proverb (via sweater-vest)