Brianno Coller

30 minutes past midnight. Laugar, Iceland.

@Dreami_Killer The answer is C. The two identical disks are spinning at the same rotation rate, but in opposite directions. The combined angular momentum is zero in the end.

Heyyy… so what’s the answer???I’m doing test corrections and they brought me to Twitter…. HELP!

Traumatized tonight, hearing the news from Michigan. 15 years ago, tomorrow, a gunman opened fire in a classroom on my campus, Northern Illinois Univ, killing 5, injuring 21, leaving an indelible emotional scar on the rest of us. So sad. So infuriating. We love you MSU. So sorry

@DarekDewey That's great!

Since we are starting break one day early with a snow day tomorrow, we decided to do some freestyle aerial skiing. Featuring hot wheels track, popsicle stick ski champ, and strategically placed rubber band.

@rjallain You have to be careful. When you have an accelerating body (the wheel) that's rolling without slip, the friction is going to play an important role. It can't just be waived away. (Back wheel too.) There are configurations for which friction is larger than applied force.

Which way does the bike go? The answer is "to the left". Here is the proof and the explanation. youtu.be/eh1CXQN4uQI

Here's my favorite warm up #physics question that I used in #ClassicalMechanics. If I pull forward on the bottom of a bike wheel, which way will it accelerate? What's your answer?

@MetaAI It keeps trying to steer the conversation back to cheese!

(1/4) Meet BlenderBot 3, the first publicly available 175B-parameter chatbot with model weights, code & datasets. It can chat about nearly any topic & is designed to learn & improve by conversing with people in the real world. Try the interactive demo: bit.ly/3Pf2s2t

@con_sut This is me. I took this picture. Why do you have a picture of me as your profile pic?

@POTUS Feb 14, 2018, was also the tenth anniversary of when a gunman killed 5 students and shot 17 more in a classroom at Northern Illinois University. So tragic

On February 14th, 2018, a gunman stole the lives of 14 students and 3 educators at Marjory Stoneman Douglas High School. Today we mourn with the Parkland families whose lives were upended and stand with those working to end the epidemic of gun violence. Congress must act.

@anaismitchell Going on a long road trip and navigating with the Rand McNally Atlas.

People who had analog, pre-cellphone childhood or young adulthood, I’m tryna write an essay, what do you miss about those before times?

@boomsupersonic On-board waffle maker.

You don’t have to work in aircraft manufacturing to win this week’s Aircraft Parts Challenge, but it gives you an edge. Be the first to correctly identify this aircraft component in detail and we’ll mail you Boom swag. You have 59 minutes. #AvGeek

@boomsupersonic EZ Pass transponder

Starting now: You don’t have to be a mechanic to win this week’s Aircraft Parts Challenge, but it gives you an edge. Be the first to correctly identify this aircraft component section (including the black square) and we’ll mail you Boom swag. You have 59 minutes. #AvGeek

@AlmaKraken @ChiMarathon Email this morning said I was not selected.

Today, one countdown ends as another begins; congratulations to all who were selected to join us for the 2022 #ChicagoStartLine, we can’t wait to see you in exactly 10 months!

@MrJoeMilliano To explain why forces between ladybug and disk are in opposite directions and still consistent with everything else, recall the Coriolis component of acceleration in polar coordinates. My explanation is below. Explanation of Coriolis is here: #VidIntuitAccel" target="_blank" rel="nofollow noopener">spumone.org/courses/dynami…

I think I’ve run into a “horse and buggy” problem for rotational motion, and I can’t seem to reason through it. Help and insights appreciated! #iteachphysics

@changandysu I don't know about AP standards, but I'm always frustrated when I have to re-teach FBDs to college sophomore engineering students. We draw the FBD for this problem like that shown below. Reasons are provided in the picture.

#iteachphysics I am doing force diagrams of two stacked blocks where the bottom block is pulled by a rope. Are these the correct force diagrams for both the bottom and top blocks? I ask because the AP Classroom solution was missing forces.

@KimFreudenberg @msruggerio explained it well. I'll just add that I like to also roll a can with a more viscous fluid such as tomato sauce in it... and compare it to the can of broth. Because some of the sauce adheres to the can as it rolls rotational inertia increases.

doing moment of interia w/ AP... can race - I thought refried beans would win but full broth wins (empty broth loses and I know why...) why does full broth beat beans? Help please! Thx! #iteachphysics #modphys

@McKaleDavis I'm surprised and impressed that the gel had such a big effect so quickly. I'm a newbie to this.

Hard to have a PhD in nutrition & admit I did not fuel well today. Was actively seeking medical at mile 17. Got in a gel at mile 18. At mile 20 decided a slow finish hurts less than a DNF any time. And now beer.

@McKaleDavis I had a big fueling mistake at the Chicago Marathon today too. The big difference is that I'm a know-nothing 4+ hour marathoner who barely crawled across the finish line. Good for you for finishing strong.

@ChiMarathon @BankofAmerica 6 river crossings, right?

Five days until you run over the Chicago River five times on your way to becoming a @BankofAmerica #ChicagoMarathon-er.

@HorizonNews @Cubs Ugh. This has nothing to do with angular momentum. Centripetal acceleration, yes. But not angular momentum.

How does angular momentum affect a player’s speed around the bases? Check out the latest “Science of Baseball” series video on the physics of baserunning. Watch more videos on the science of the game, as part of our Legacy Partnership w/ the @Cubs here: bit.ly/3jCJC8S.