Electric Charge and Light - Physics 101 / AP Physics 1 Review with Dianna Cowern
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- Опубликовано: 26 янв 2021
- Lesson 18 (Electric Charge and Light) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need a review of AP Physics concepts before the exam? This course is for you!
Exercises in this video:
1. How many electrons are in 1 Coulomb of charge? How many protons?
2. What is the electromagnetic force between an electron and a proton that are separated by 1nm?
3. To compare, what would the force of gravity between the proton and the electron be?
4. An electron is in a constant electric field with a strength of -4.4x10^5N/C. What force is being exerted on that electron by the field?
Credits:
Dianna Cowern - Executive Producer/Host/Writer
Jeff Brock - Lead Writer/Course Designer
Laura Chernikoff - Producer
Kaitlyn Ali - Video Editor
Bryn Bishop - AP Curriculum Consultant
Sophia Chen - Researcher/Writer
Erika K. Carlson - Researcher/Writer
Hope Butner - Production Assistant
Levi Butner - Videographer
Lauren Ivy - Set Design
Vanessa Hill - Consulting Producer
Aleeza McCant - Illustrator
Rachel Allen - Illustrator
Consultant - Kyle Kitzmiller
Lucy Brock, Samantha Ward - Curriculum Consultants
Cathy Cowern - Transcription 
Наука
"Whatever your planet is," did not know people from other planets were watching haha
Dianna’s channel is very popular. :-D
I was thinking the same thing and had go back and listen again to make sure i heard her correctly.
Soon they'll do...
Electrons flow in the atom Anthony
That'sthejoke.jpeg
Why is this so underrated
I know right, she's so good a teaching - even better than 10 $100 courses you can get online
I beg to differ. 1.7 million subscribers is not "underrated" by any modern measure. I think you misunderstand the word.
@@sschmidtevalue I didn't mean her chancel being underrated, I mean her Physics With Diana series and this video in particular. I guess not everyone is interested in this stuff. And now it's 23k views but before it was literally 2k (k = thousand) so you can't blame me.
@raditguntoro9946
Because "the knowledge isn't ''''fun'''' enough", I guess...
Great video! I like your down to earth straightforward approach, without getting lost in science fiction which so many tend to do nowadays. The science fiction approach may be conceived as a way of doing mental exercises and attracting people to science, but can also lead away from a straightforward understanding of the universe we live in. Keep up the good work!
“One must be sane to think clearly, but one can think deeply and be quite insane.”
― Nikola Tesla
I can imagine he made that statement due to the fact that he was a weird one and many people have classified him as such.
"sanity is just madness put to good uses"
@@Bassotronics (deeply > clearly) > sanity
@@Bassotronics intelligent people who think outside of the Box are often Classified unusual, they had also classified Howard Hughes in the same manner with OCD's and eccentric...
@ *Steve-o*
Interestingly, I’m not exempt from that since I am pretty much the same way myself.
I LOVED that you've provided some exercises at the end of the video! I had to drop Physics at uni but after 10 years I still crave to go back to study it and this videos help me to stay focused. Great job and great teacher :)
I wish I knew this two years earlier. I will still watch all of them. Love you dianna!!! Please, I wish to God you get healthy very soon.
I was just studying the exactly same thing and thought of searching your channel. What a wonderful surprise!
I love descriptions of physics. I would love, even more, an explanation. This video was great but, just to be sure that there is no confusion, and just like from most Science Communicators, offers the former; instead of the latter.
Physics does not provide explanations in the sense you mean. Physics creates mathematical models of the world, and compares the models to experiment. That's all.
@@michaelsommers2356 "That's all." I know, because, often, they are descriptions of models, approximations and interpretations of experimental outcomes; which has worked out well, granted. But calling descriptions, or models, an explanation suggests we know more than we do.
We had a spike in scientific advancement, now, a plateau. The spike occurred with many times fewer people working on scientific inquiry. Generations, current and moving forward, because of word play, think we know the "why" but barely know the "how".
How many people, especially scientists, even realize that they've swapped "explanation" for "description." Those words aren't interchangeable. They are not synonyms.
@@StudioArrayMusic What you don't seem to understand is that words have different meanings in different contexts. You seem to want physics to provide the answer to the ultimate question of life, the universe, and everything. As I said, physics doesn't do that.
wow !!! waited for this chapter for a long time !!!! at last...... ❤️❤️❤️
Thanks so much for creating and sharing this educational and entertaining video. Great job.
Hope that each day you are feeling better than the day before.🙏
What a coincidence! I was studying electricity these days and electricity is fun but SHOCKING !
Shock to me too for the same reason!
I've understood how to use capacitors for decades, but this finally made me realize WHY they work the way they do. Thank you!
You have a fantastic channel to learn from, and your enthusiasm in the way you present this subject is just great, I have a six year old granddaughter, and I will show her your channel. plus I am into Amateur radio and electronics in general, thank you for a great educational and entertaining channel.
Thanks for the video Dianna ❤️ always knowledgeable.
Intensely well explained! Thanks for the details! They help lots to understand all the theory... Cool.
Yay new episode ! thank you for sharing !
Keep on doing this. And let me catch up.
This was really interesting! and it reminded me a lot of the mechanism with which human neurones fire. The cell membranes are said to have capacitance, making an action potential to pass through possible. It would be so interesting if you could look into that from a physics perspective!
10:30 The close up view didn't have the Coulomb term squared but the wide angle did. Might have been an idea to have superimposed the ² during editing.
I was thinking the same
Thank you! I noticed the same thing and had to really scroll to find a comment referring to this. Was wondering if I was the only one to notice! 🤪 lol
revisiting my physics lessons in an understandable way ! thank you so much !
electrical engineer watching here! thanks Diana
Good, so you understand that: ... 22:10 --- this only explains an AM - radio... but this is not how FM radio works, or wifi, or bluetooth, ect. ect.
After watching so many of your videos, I am beginning to believe you really like math or something. Very enjoyable and knowledgeable videos!!
Great video. Mind bending and encouraging. Who wants a teacher who just turns their back to the class and scribbles chicken scratch on a chalk board? This is back to the glory days of science being exciting and fascinating. There aren't enough awards out there for this RUclips channel. Ha ha.
What you are doing is awesome. Thanks Diana 🤘😁 Good Stuff
Electromagnetism killed me at school. Glad that all data sheets come with example circuits and sOc's don’t need much to work. Only need this knowledge for troubleshooting 😁
Static electricity almost killed me in high school when I absent-mindedly touched the Van de Graaf gnerator in the physics lab ... hurt like §$%&!
Brilliantly done
Derek and Diana are the coolest teachers
I love you Dianna, the way you teach physics is awesome...
Thanks for shedding some light on the subject. :-)
Around 10:35, didn't she forgot to square the charge? She said to square it, and she appears to have squared it when calculating the answer, but there's no 2 superscript after the parenthesis. They've been superimposing quite a few corrections/improvements over her (remarkably good) illustrations in post-production; too bad they didn't catch this one.
Waves and fields are related to each other much like gravity and mass. I often think of waves crashing on the beach. The rotate in a tubular shape around a center. There is metric tenser interaction between the field and the particle/ wave. Nature has a way about showing us deep truths in simple ways, if only we would pay attention to her (ie nature).
Becomes apparent just looking at equations for the force of gravitional & electricial ( Coloumb ) attraction
I'm a 10th grader from India and this is what we gotta learn in our first chapter of physics. And let me tell you that your explanation was dope.
24:00 “It was so important to find out there was no Aether that we started looking for it again but now we call it Higgs Boson.”
It must be your own perspective on this illusionist physical universe??
@@narayandeshmukh7370, I don’t have perspective - only the balls to call out BS when I smell it.
I will watch this video to prepare for the future.
What a great way you describe capacitance
I like the beginning.
Really nicely done ...very clear.
You explain it really well 👍
Thanks for this video!
Thanks...I was studying the same chapter....
When I took High School Physic, if Dianna Cowern were my Physic teacher, boy I would've had a major crush on her. I'd brought her an apple every class!
Every time I see these I feel Physics more FUN and Enjoyable
And Dianna the reactions and expressions make it so adorable
But,
Just smash a coool intro at the starting as like Peter Mckinnon
That might increase the curiosity to INFINITY !!!!!!11
The use of charges like the bandage is sooo useful
If little 'm' sees a radially symmetric field about big 'M", what does big 'M' see? Certainly not a radially symmetric field about little 'm'. The field is in fact radially symmetric about the centre of mass so the correct formula is:
F = G * m1 * m2 / (r1 + r2)^2
Where r1 and r2 are measured from centre of mass. I think that precludes the singularity at r=0 because m1 and m2 cannot occupy the same space at the same time. Furthermore, the centre of mass is defined by m1 * r1 = m2 * r2 so the following forms of Newton's equation are also valid:
F = G * m1 * m2 / (1 + m2/m1)^2 / r2^2 = G * m1 * m2 / (1 + m1/m2)^2 / r1^2
5:14 - "What ever your planet is"
Proven that this footage goes to another planet because alien also need that great teacher
Awesome presentation Diana, great subject choice, and thanks for the thoroughness, though my question is: You used Spark as visual representation of the electrical magnetic force in the air, should it have been called the Electrical Arc, didn't know some of the historic aspects or mathematical formulation. I had work in personal maintenance with electrical work in automobiles ( no never hot wired a car, lol ), and at home
1. You are AWESOME ......... 2. How many takes did it take to catch that pen ......... 3. I wish i had your knowledge and intelligence, with my insatiable curiosity and obsessive interest in physics, the things i could achieve would be awesome .........stay YOU and stay SAFE
Keep em coming.
10:31 you screwed up. you only put down one charge but not the other. were you planning to square the bracket?
10:38 there is square :) Looks like in initial shooting she wrote correct, but when she was shooting from the top of the table she forgot the square.
ooh i observed that luminescence also when fast forwarding a tape cassette!
Actually it's Triboluminescence.
You can also observe it by smashing a sugar cube using a pliers in a dark room.
@@taseronify is it just light or does it also emit uv or anything else?
@@stellabckw2033 Not sure but Wikipedia says scientists observed x-rays with a roll of tape in a vacuum.
en.wikipedia.org/wiki/Triboluminescence
Good job Stella
Fabulous!!♥️♥️🔥🔥
Dear Dianna! Thank you very much for this course. Do you planning to create more advanced courses on mechanics, electricity and magnetism and vibrations and waves, and maybe even quantum mechanics, like the 8.01-8.04 courses at MIT?
Hey Diana, this is out of subject, but I was looking forward to last june 2020 for the PhysicsGirl/Starset show in Montreal. Since it got cancelled due to obvious reasons, will this collab come back ? Or would your part be a youtube video ?
Thank you!
cool fun video, thanks
Since we have photons for visible light, are there also photons for radio waves and xrays and all the other wavelengths on the EM spectrum?
HEY! *important*
AP has taken electricity out of the AP 1 test. It’s still good for students to learn but just FYI to any students or teachers who are taking/teaching AP1. Units 8-10 have been removed.
Why in the world are they dumbing down AP?! Heard about it since my time. 2010 they said.
@@ABCantonese I think it’s because of COVID. We’ve lost a lot of time to teach material. Plus, teaching mechanics all year and then randomly throwing electricity at the kids was kinda weird lol
Love your videos
Miss Dianna me Nikunj Deep Upadhyay is your obedient Indian student it's my humble request kindly make video on radioactivity
Love the starry Blous!
Sounds like a van gogh painting.
Hi Dianna, I think the time has come to create a channel in Spanish as Veritasium did. Your channel is great, interesting, professional, and full of very important information. Think about it!
Thanks so so much mam. 🙏
So what type of field is used to describe in the satellite to house experiment showed , a linear filed or a radial field ?
I just saw this the other night while opening a bandage in the dark. Way cool!
Whoa! Watching one minute after uploading! :D
Do you know the difference between a seal and a sea lion? A seal ion is a seal that lost an electron.
Groan...
P.S. stealing.
Hey there Diana... Could you please tell us a bit about ionic blow dryers and explain how they can be so much better in comparison to more outdated ones? And, perhaps throw in some explanation about the cool sensation we get near a fan, while you're at it.
thanks luv 👨⚖
That was pretty cool and I did know that, but did you know that sound is also light just on a different wavelength.. Anyway awesome show it kinda helped me with something keep up the good work Dianna!!🧲🖇️⚡
Waiting for this one 🥺🥺
I would like to know how electricity travels through a wire. But I want to know specific things that I can’t find in any video like for example, do all the electrons travel together in a straight line? Or do they bump into each other causing heat? How does quantum tunneling affect electrons as they travel through the wire? Does the impurities of the wire slow down some electrons or stop them in its tracks while others continue? Among other curious things.
No they don't bump into each other. Their charge doesn't allow it. Actually the vast majority of area in an atom is empty space. And no, electrons don't actually "travel in a straight line" -- because the wire is 3 dimensional, and they will follow the path of least resistance, like lightning-- across the area of the wire; Actually on AC transmission lines where the voltage is as high as 800 kv, the voltage travels along the outer edge of the wire and almost none travels down the center of the wire, known as "skin effect". "Heat in a wire is caused by too much current traveling through a wire that is too small. You can completely mitigate the heat by steppingup the voltage, which will reduce the current though the wire, for the same given power output.
@ *calholli*
Thanks calholli.
Amazing
This is so much better than online classes
What if a planet has magnetic field but the moons do. Could the moons block radiation also.
Question for Dianna:
From what I know all transverse waves are part of the EM spectrum. But are all EM waves really light? Are radio waves light?
Hi Dianna, are you still monitoring your past videos? If so -- I have a question:
If you have a long straight wire with AC current -- how would EM wave for it look like?
Do you perhaps have any link suggestions?
Many thanks in advance and best regards, Boris
PS: I am scarred to even ask about the same for DC current ;-))
How electricity and quantum length or plank length are related since we are dialect or diluted the volume of electrons and for making energy differential constant we see the difference in form of illumination from of electrons
The content of this video is very attractive.
I have plans for a large Rodin coil. Some strange things happen in the center when a power source is applied.
Doesn't the Morley experiment depend on the assumption the earths movement would effect the aether
Finally 10th students in India got relief.....
मस्त लगा विडियो 👍
yes..the Force is everywhere and everything
Oh my gosh, thank you! I don't know why, but I was opening bandaids in the dark and I find that out. I was eleven or twelve. Then I showed my science teacher, but we weren't able to show the class, because there was too much light in the room. We still a went over some stuff about it anyways.
Woo superbly
Physics is awesome!
How much friction to you think is affecting particles by space-time with zero g in a vacuum?
Is there an issue with the sound?
So what is the relation between the gravitational field and the warping of SpaceTime?
I follow many channels who have challenged, disproved Flat Earth. But, none have done it as simply, and as easy to understand as you just did. They, as I, have a lot to learn.
The same is said, if you unwind a spool of film in a dark room too fast, you create a green flash of static energy, resulting in a partially exposed image on which previously had no exposure to light. This instance the v.f=3600v for the static to turn green at a wavelength of 550nm / and a frequency of 5.45hz (f10x14). The same phenomenon also changes colour in a highly dense (dry) room ... Oop's !!!
Nice!
Shockingly informative⚡️
Question: because the speed of light is a constant irrespective of the observer. Wouldn't the Michelson Morley experiment anyways give a null result? Therefore the experiment really doesn't prove or disprove the presence of the ether. Does it????
please upload jee based questions on your channel. As it would allow the viewers to understand application of complex concepts.
wow... thats more than interesting that coulomb's law looks alot like the law of gravitation, theres things to b discovered with relationships like those
thank you very much for this valuable lessons 😍😍🙏🙏...... please what did you mean " light caries the information that charges have accelerated" in 23:30 what did you by "information" in particular 🤔🤔
that's a blurry explanation like many others. I am sure that even she doesn't know what mean 'light carries an information' but saying what has learnt
👋
16:00 you did not ripped electrons from the wall..
By ripping the tape off the wall fast, you only aligned they're charges in the same direction.
Removing electrons from any elements atom should make this another element.
@@noeckel could be like that also.
Every theory or ways of thinking are good.
👍
Super Brilliant
I thought you were going to square that value of (1.6 x 10^-10C)?
She squared it the math, she neglected to write it. .. it happens
We wanna know about Em waves