physics and chemistry

Study tip: Get a whiteboard! Especially if you are a math/physics/astronomy/chemistry… student because you are going to do a lot of calculations and formulas. And if you are as stupid as me you will waste a lot of paper on one damn equation.

“But I can’t afford a whiteboard!” you say. Don’t worry I’ve got your back. Just buy a glass picture frame. Instead if a picture put a white paper underneath the glass and voila! DIY whiteboard!

The picture above is my (after 7 hours) finished astronomy homework.
📍Hope you like it! 📍

10

What Is The Universe’s Third Most Common Element?

“But there’s one killer move that stars have that makes carbon a loser in the cosmic equation: when a star is massive enough to initiate carbon fusion – a requirement for generating a type II supernova – the process that turns carbon into oxygen goes almost to full completion, creating significantly more oxygen than carbon by time the star is ready to explode.”

When the Universe was first born, all we had was hydrogen and helium, with a trace amount of lithium and absolutely nothing else. 13.8 billion years later, hydrogen is still #1 in the Universe and helium is still #2, but lithium isn’t close to #3 anymore: more than two dozen elements have passed it. The key? Stars! Over billions of years, nuclear fusion in the cores of stars have built up all the naturally occurring elements we know of in the periodic table. You might think that since three heliums can fuse together to make carbon, that would be the third most common element in the Universe. And it’s close: carbon comes in at #4. But another element has it beat.

So who’s number 3, and how did it get to be that way? It’s oxygen! Find out why today.

Must be frustrating being a scientist. There you are, incrementally discovering how the universe works via a series of complex tests and experiments, for the benefit of all mankind - and what thanks do you get? People call you “egghead” or “boffin” or “heretic”, and they cave your face in with a rock and bury you out in the wilderness.
Not literally - not in this day and age - but you get the idea. Scientists are mistrusted by huge swathes of the general public, who see them as emotionless lab-coated meddlers-with-nature rather than, say, fellow human beings who’ve actually bothered getting off their arses to work this shit out.
—  Charlie Brooker
docs.google.com
The Scientists' March on Washington
Thank you so much for your interest in the Scientists' March on Washington! We would appreciate if you could fill out this form to help us best make use of the incredible outpouring of support. We will update you as soon as we have more information to share!

Attention folks who are into science, or who are scientists themselves! There’s likely to be a March on Washington for scientists and for folks who love science sometime soon. If you’re unable to make your way to DC, there’s going to be sister marches around the country. The above URL is a way for you to communicate your interest in helping to create those sister marches. These marches are representative of everyone regardless of, well, anything as science has no limits, and crosses every single barrier that unfortunately separates us as social creatures. I’ve signed up to help create a group here in Portland, and with my background in GIS, leadership, and in social media, I hope to help make a difference with the main DC organization.

Pass it along.

Space fact #5

If you and I are in separate space ships both traveling fast, there’s literally no possible way to determine if I am staying still and you are moving, or if you are staying still and I am moving, or if we are both moving. Also, from your perspective time will flow normally for you and slower for me, but from my perspective time will flow normally for me and slow for you.

Basically, everything, including time, is completely relative.

[Proposition] 4 Fundamental Laws of Time and Time Travel and their reasoning

These are just my thoughts, feel free to add and give feedback!

1. Time affects all matter

Reasoning: Without time, nothing would exist, and time governs entropy, which affects all matter

2. Time Travel to the past is impossible

Reasoning: Matter cannot be created or destroyed. If something exists in the present, going back and destroying whatever caused it, would cause it to not exist.

Example: The Grandfather Paradox. By traveling back in time and killing their grandfather, the killer could not be born, and would stop existing, therefore never being able to kill their grandfather. But if the killer exists, then there is no action (including traveling to the past and killing their grandfather) that would remove them from existence

3. The future is fixed

Reasoning: Method 1: If you travel to the future, and see some terrible event, there is nothing you can do to travel back into the past and warn your friends about this event, or prevent it (as time travel to the past is impossible)

Method #2: A psychic can see the future, and sees an asteroid is going to hit earth, and warns people in time for them to be evacuated to a different planet. Then the future was never that the asteroid would hit earth, but that they would evacuate to a different planet.

4. No alternate timelines exist in this universe

Reasoning: Time affects all matter, if there were an alternate timeline in this universe, we would see the effects on all matter. If there is a different timeline, one that can only affect a different set of matter, (a set of matter we can’t observe) then that set of time and matter is not this universe, but a different one.

Just some shower thoughts, feedback is extremely appreciated :)

-Harrison Wells