HS Physics Teacher (ret) • Author @ TPT (The Lessons of Phyz) • and @ Pearson • https://xitter.cf/t.co/0lZ3fbUclY
Bozeman, MT
Joined July 2009
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Dean Baird retweeted
I was tired of dealing with the old incandescent light boxes last time I used them. We had to have the room fairly blacked out, needed voltage sources, burned out a bunch of bulbs, etc. These LED flashlights show color addition with lights off and windows open! 😍 #iteachphysics
ALT Blue LED light and green LED light shown on a white cars in a room without overhead lights but large open windows. The color cyan is seen when they overlap.
ALT Top row is blue light overlapping with green light to make cyan. Middle row shows red light overlapping with green light to make yellow. Bottom row is red light overlapping with blue light to make magenta.
ALT Top image shows red light overlapping with blue light to make magenta, blue light overlapping with green to make cyan. Bottom image shows a battery blocking the overlapping light from all three lights making white so that different colored shadows are made.
Dean Baird retweeted
If you have one of these wave machines and ever found that the rods fall out, you can buy rubber grommets to make sure they don't.
Somehow this tipped over a few times in a week and it was annoying to reassemble. Never again! I can even hold it upside down.
#iteachphysics
Dean Baird retweeted
I was intrigued by an unlabeled bubble of nebulosity I noticed on Stellarium. It did not show up on my Tirion Sky Atlas either. After searching online, I identified it as the supernova remnant CTB-1. It took 3 nights to gather enough exposures to reveal this dim target in HSO.
Dean Baird retweeted
Karbon fiberin termal ve elektriksel iletkenliği çok yüksek olduğundan 3000°C'nin üzerindeki sıcaklıklara dayanabilir.
Dean Baird retweeted
NEW VIDEO! - AP Physics 1 - Unit 2b Review
Universal Gravitation, Spring Force, and Circular Motion
Check it out, eh! youtu.be/2p-sSRU6WJI
#APPhysics1 #Unit2 #ExamPrep
Dean Baird retweeted
Submissions are open for the 2025 National STEM Festival! NationalSTEMFestival.com
Students 7-12 grade in US and its territories can win a trip to DC to present their projects on the nationals stage.
You can also join our STEM community by volunteering!
@ExplrMedia @national_stem #stem #Science #sciencefair #steam #teachers
Dean Baird retweeted
Does @Simone_Biles really get 12 feet above the floor? Here is my #physics investigation
Dean Baird retweeted
Important reminder: Do not assign too high a degree of reality to anything you hear regarding breaking news events for about 24-48 hours.
Dean Baird retweeted
Imagine being a badass scientist, MIT Physics, Forbes 30u30, and having millions of followers on multiple social media communicating about sciences. Just married, full of hopes and dreams. Suddenly, this is everyday life for you. This is the reality of @thephysicsgirl and so many others. It can happen to anyone. #LongCovid #NotjustaFlu
Dean Baird retweeted
This activity and much more are described in Dave Rakestraw's Physics with Phones unit: Experimenting with Electromagnetic Waves (Part 2). This is Experiment 9 in the slides: st.llnl.gov/sci-ed/Physics-w…
Dean Baird retweeted
I used an image from Dave Rakestraw's Physics with Phones project to project cyan, magenta, and yellow lights on my TV to cast the shadows on a screen. Your students can do this and more, see Experiment 3 - Part 1, Experimenting with Electromagnetic Waves: st.llnl.gov/sci-ed/Physics-w…
Dean Baird retweeted
New paper from Norway: Banning smartphones in school
- significantly decreased doctors visits for psychological symptoms and diseases among girls
- reduced bullying among both genders
- improved girls’ GPA and attendance rates
- largest effect sizes were among the poorest kids
Dean Baird retweeted
Do you see a pyramid on top of a pedistal or do you see a hollow pedistal? Whichever change your focus and it will change. #mindf@ckd yet? #banachek #banacheksbrain #banacheksmindgameslive
Dean Baird retweeted
NEW VIDEO! - Buoyant Force Equation: Step-by-Step Derivation
Check it out, eh! youtu.be/8badglbR2Jo
#Buoyancy #BuoyantForce #Derivation
Dean Baird retweeted
This interactive museum exhibit allows you to test the gravity on Earth, Sun and the other planets by lifting an apple
Dean Baird retweeted
Smoke usually doesn't behave like a liquid, because its particles tend to rise, carried by convection currents.
But there are conditions in which smoke can drip like water, especially when it can cool down and condense, becoming denser than air.
Dean Baird retweeted
Don't forget to checkout our story about a teacher who took their FLIR ONE Edge with them to Antarctica that we released last month on our website!
#teachers #climatechange #antarctic #nature #wildlife #environment
