#PhysicsFriday #FollowFriday #NoireSTEMinist #MySTEMIsFortheStreets
Marlena throws a ball in the air and catches it 3.5 s after throwing it vertically upward. With what speed did she throw the ball? Assume free fall, zero acceleration, no air friction, g = 9.8 m/s²

Can you have negative velocity and zero acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

Can you have positive velocity and zero acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

Can you have negative velocity and negative acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

Can you have positive velocity and positive acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

Can you have positive velocity and negative acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

Can you have negative velocity and positive acceleration? #PhysicsFriday Answer
#NoireSTEMinist #MySTEMIsForTheStreets

So my kid is now in Physics so it is time for a new topic. 10th grade Physics!! #PhysicsFriday #NoireSTEMinist #MySTEMIsForTheStreest
#BlackSTEM #WomenSTEM #blackMastodon #BlackFediverse #BlackTwitter
Can you have negative velocity and positive acceleration?

So my kid is now in Physics so it is time for a new topic. 10th grade Physics!! #PhysicsFriday #NoireSTEMinist #MySTEMIsForTheStreest
#BlackSTEM #WomenSTEM #blackMastodon #BlackFediverse #BlackTwitter
Can you have positive velocity and negative acceleration

Really great point here in the introduction to this doc: from a photon's perspective, everything is touching everything else, no matter how short or long the journey between.
#cosmology #physicsfriday #physics
https://www.youtube.com/watch?v=bAedYtUredI

#PhysicsFriday Well... it's an Australian Friday tomorrow. I'm posting early because I'm presenting at a local physics teachers conference Friday, and so I might not post then.

My stich is presentations about physics "just beyond", but directly relevant, to the curriculum. I like encouraging teachers to ensure they remain excited about the physics and nurture their own understanding - which hopefully rubs off on their students.

This time, a few tid-bits about E = mc². #Physics #ITeachPhysics

#Physics #ITeachPhysics #PhysicsFriday

OK. So why does even a reasonably good high school physics text say some odd stuff e.g. Discussing inclined planes, it has a specific, important looking (in a box) note for students to beware that components of the gravitational force are not really forces (ditto the net force)... sure-ish... but then says the normal force and friction are forces, despite them similarly being components of F_planeONobject. 1/2

#PhysicsFriday #ITeachPhysics

A physics teacher is standing on a slope with one of their students.

Student: Physics can be difficult.

Teacher: I’m inclined to agree.

#Physics

#PhysicsFriday Such a small capsule, but it emits a significant amount of radiation... and to loose it in such a LARGE area. A very radioactive needle in a large haystack! #ITeachPhysics #Physics

[see the article in
@NikkiNerdPhys's post]

https://techhub.social/@NikkiNerdPhys/109760444064954374

#PhysicsFriday Such a small capsule, but it emits a significant amount of radiation... and to loose it in such a LARGE area. A very radioactive needle in a large haystack! #ITeachPhysics #Physics

[see the article in
@NikkiNerdPhys's post]
https://techhub.social/@NikkiNerdPhys/109760444064954374

A short story for #PhysicsFriday about Eugene Wigner. While Wigner was a very influential physicist, AFAIK he's not as generally well-known as others.
#Physics #ITeachPhysics
Post by @johncarlosbaez
https://mathstodon.xyz/@johncarlosbaez/109683036020059089

#PhysicsFriday As mentioned in a previous post family health required a technetium tracer (milked from molybdenum that, in Oz, comes from the sole (research) reactor, called OPAL, in Sydney. Today it's a PET scan. Flourine-18 is required and TIL (I feel I should have known) it's produced locally in cyclotrons - from bombarding O-18 enriched water wih protons. Good to know that this is a less fragile supply chain.

Did you know (yes, many of you who interact with me would, but some might not) that physicists originally thought neutrino's were massless?

However, it turns out they have some mass. A very tiny, weany, miniscule amount. No more than about 1.5 x 10⁻³⁶ kg (that's 0.0000000000000000000000000000000000015 kg) - that's not "latest news" at all, but a relatively recent result. If anyone has a newer reference, they can post it in replies.

[Posting early for #PhysicsFriday.]

https://www.washington.edu/news/2022/02/23/katrin-neutrino/

You might remember me from such hashtags as #PhysicsFriday.

[A Troy McClure reference that just popped into my head. I blame the gazillion neutrinos streaming through my body every second... one of them must have just reacted!]

I ended up in a nuclear medicine department for family related reasons but I couldn't help chatting to the nurse about the material in the injection... technetium, only a 6 hour half-life so it's "milked" from a molybdenum "generator" that originates from the Opal reactor in Sydney. It made me think about the fact that with just the one research reactor in Australia, there is a very fragile supply chain. #Physics

[An early #PhysicsFriday post - though, in Australia, it is at least Thursday.]