Electric Charge and Light - Physics 101 / AP Physics 1 Review with Dianna Cowern

Рет қаралды 128,518

3 жыл бұрын

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

Пікірлер: 392

@MxXAnthony143Rmx 3 жыл бұрын

"Whatever your planet is," did not know people from other planets were watching haha

@adlockhungry304 3 жыл бұрын

Dianna’s channel is very popular. :-D

@rickchainey830 3 жыл бұрын

I was thinking the same thing and had go back and listen again to make sure i heard her correctly.

@palantea1367 3 жыл бұрын

Soon they'll do...

@naisha2307 3 жыл бұрын

Electrons flow in the atom Anthony

@XXniccloXX 3 жыл бұрын

That'sthejoke.jpeg

@raditguntoro9946 3 жыл бұрын

Why is this so underrated

@zaceriah8576 3 жыл бұрын

I know right, she's so good a teaching - even better than 10 $100 courses you can get online

@sschmidtevalue 3 жыл бұрын

I beg to differ. 1.7 million subscribers is not "underrated" by any modern measure. I think you misunderstand the word.

@zaceriah8576 3 жыл бұрын

@@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.

@ivoryas1696 2 күн бұрын

@raditguntoro9946 Because "the knowledge isn't ''''fun'''' enough", I guess...

@johnrdorazio 3 жыл бұрын

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!

@upsidedownChad 3 жыл бұрын

I was just studying the exactly same thing and thought of searching your channel. What a wonderful surprise!

@squeakytoyrecords1702 3 жыл бұрын

“One must be sane to think clearly, but one can think deeply and be quite insane.” ― Nikola Tesla

@Bassotronics 3 жыл бұрын

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.

@calholli 3 жыл бұрын

"sanity is just madness put to good uses"

@calholli 3 жыл бұрын

@@Bassotronics (deeply > clearly) > sanity

@steve-o6413 3 жыл бұрын

@@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...

@Bassotronics 3 жыл бұрын

@ *Steve-o* Interestingly, I’m not exempt from that since I am pretty much the same way myself.

@nadg866 3 жыл бұрын

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 :)

@vanitha1194 Жыл бұрын

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.

@c0d3m0nky 2 жыл бұрын

I've understood how to use capacitors for decades, but this finally made me realize WHY they work the way they do. Thank you!

@tomcat1112k 3 жыл бұрын

wow !!! waited for this chapter for a long time !!!! at last...... ❤️❤️❤️

@drmushtaqahmadmalik4417 3 жыл бұрын

What a coincidence! I was studying electricity these days and electricity is fun but SHOCKING !

@samyakkhobragade5401 3 жыл бұрын

Shock to me too for the same reason!

@guruofeverything6379 3 жыл бұрын

Keep on doing this. And let me catch up.

@samedwards6683 4 ай бұрын

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.🙏

@roycefaggotter8379 3 жыл бұрын

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.

@ayushkr.3944 3 жыл бұрын

Thanks for the video Dianna ❤️ always knowledgeable.

@nv4142 3 жыл бұрын

Yay new episode ! thank you for sharing !

@StudioArrayMusic 3 жыл бұрын

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.

@michaelsommers2356 3 жыл бұрын

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.

@StudioArrayMusic 3 жыл бұрын

@@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.

@michaelsommers2356 3 жыл бұрын

@@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.

@slaeyvasramm2460 3 жыл бұрын

Intensely well explained! Thanks for the details! They help lots to understand all the theory... Cool.

@fredouille_3735 3 жыл бұрын

revisiting my physics lessons in an understandable way ! thank you so much !

@avynr3394 3 жыл бұрын

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!

@MartinTowell 3 жыл бұрын

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.

@SFYN.. 3 жыл бұрын

I was thinking the same

@NKzutube 3 жыл бұрын

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

@gmsherry1953 3 жыл бұрын

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.

@PinayEngineer 3 жыл бұрын

electrical engineer watching here! thanks Diana

@calholli 3 жыл бұрын

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.

@amphibiousone7972 3 жыл бұрын

What you are doing is awesome. Thanks Diana 🤘😁 Good Stuff

@ChasingDifferentAdventures 3 жыл бұрын

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

@user-fz9go8pj4t 3 жыл бұрын

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?

@smokey04200420 3 жыл бұрын

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.”

@narayandeshmukh7370 3 жыл бұрын

It must be your own perspective on this illusionist physical universe??

@smokey04200420 3 жыл бұрын

@@narayandeshmukh7370, I don’t have perspective - only the balls to call out BS when I smell it.

@CraigConnors 3 жыл бұрын

After watching so many of your videos, I am beginning to believe you really like math or something. Very enjoyable and knowledgeable videos!!

@tonybowers9490 3 жыл бұрын

Thanks for shedding some light on the subject. :-)

@MrBRE3Z 3 жыл бұрын

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 ?

@mordakoAT Жыл бұрын

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 KZfaq channel. Ha ha.

@smhaseeb 3 жыл бұрын

I will watch this video to prepare for the future.

@mrxmry3264 3 жыл бұрын

10:31 you screwed up. you only put down one charge but not the other. were you planning to square the bracket?

@mixei4 3 жыл бұрын

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.

@engineereverything9055 3 жыл бұрын

Derek and Diana are the coolest teachers

@glaubhafieber 3 жыл бұрын

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 😁

@f.d.6667 3 жыл бұрын

Static electricity almost killed me in high school when I absent-mindedly touched the Van de Graaf gnerator in the physics lab ... hurt like §$%&!

@josephsage3524 3 жыл бұрын

Brilliantly done

@Petrov3434 3 жыл бұрын

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 ;-))

@tarunpal9622 3 жыл бұрын

I love you Dianna, the way you teach physics is awesome...

@tommylee2894 3 жыл бұрын

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!

@Sophistry0001 3 жыл бұрын

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?

@mikegale9757 3 жыл бұрын

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

@Butters_Stotch530 3 жыл бұрын

I like the beginning.

@mastikitrain2844 Жыл бұрын

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.

@Darkanight 3 жыл бұрын

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 👨‍⚖

@astrophile8432 3 жыл бұрын

Fabulous!!♥️♥️🔥🔥

@osmosisjones4912 3 жыл бұрын

What if a planet has magnetic field but the moons do. Could the moons block radiation also.

@physicsheart543 3 жыл бұрын

You explain it really well 👍

@infinitumneo840 3 жыл бұрын

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).

@chordia919 2 жыл бұрын

Becomes apparent just looking at equations for the force of gravitional & electricial ( Coloumb ) attraction

@benjaminkintz4770 3 жыл бұрын

What a great way you describe capacitance

@math_the_why_behind 3 жыл бұрын

Thanks for this video!

@stellabckw2033 3 жыл бұрын

ooh i observed that luminescence also when fast forwarding a tape cassette!

@taseronify 3 жыл бұрын

Actually it's Triboluminescence. You can also observe it by smashing a sugar cube using a pliers in a dark room.

@stellabckw2033 3 жыл бұрын

@@taseronify is it just light or does it also emit uv or anything else?

@taseronify 3 жыл бұрын

@@stellabckw2033 Not sure but Wikipedia says scientists observed x-rays with a roll of tape in a vacuum. en.wikipedia.org/wiki/Triboluminescence

@naisha2307 3 жыл бұрын

Good job Stella

@himanibhyan7569 3 жыл бұрын

Thanks...I was studying the same chapter....

@cosmorito961 2 жыл бұрын

5:14 - "What ever your planet is" Proven that this footage goes to another planet because alien also need that great teacher

@devdeepsinghbhuee1050 3 жыл бұрын

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

@leighcoulson2148 3 жыл бұрын

Really nicely done ...very clear.

@Suburp212 3 жыл бұрын

Keep em coming.

@GLuft3 7 ай бұрын

I just saw this the other night while opening a bandage in the dark. Way cool!

@ChubyX 3 жыл бұрын

How much friction to you think is affecting particles by space-time with zero g in a vacuum?

@codedaily365 3 жыл бұрын

Finally 10th students in India got relief.....

@chadlawson2489 3 жыл бұрын

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!!🧲🖇️⚡

@dhionas 3 жыл бұрын

Is there an issue with the sound?

@Noneblue39 3 жыл бұрын

The use of charges like the bandage is sooo useful

@Alfirio 3 жыл бұрын

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.

@ABCantonese 3 жыл бұрын

Why in the world are they dumbing down AP?! Heard about it since my time. 2010 they said.

@Alfirio 3 жыл бұрын

@@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

@paulw858 3 жыл бұрын

Whoa! Watching one minute after uploading! :D

@albin1361 3 жыл бұрын

So what type of field is used to describe in the satellite to house experiment showed , a linear filed or a radial field ?

@larrytinsley4247 3 жыл бұрын

Doesn't the Morley experiment depend on the assumption the earths movement would effect the aether

@LTL_king 3 жыл бұрын

I have watched all of the lesson videos. At some point during the videos it gets wayyy to much to keep following. Usually around the point some where around when you get out the marker and paper and start doing all that math. I've taken up to getting into calc, but way back when. I've forgotten so much of it. Are the older videos going to make a come back.

@anilsharma-ev2my 3 жыл бұрын

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

@PapaFlammy69 3 жыл бұрын

>paper

@ProfPepper58 3 жыл бұрын

p a p e r

@gabrielfonsec 3 жыл бұрын

Harvesting subscribers. lol☺

@1.4142 3 жыл бұрын

get outta here

@naisha2307 3 жыл бұрын

Electricity is the constant flow of electrons Flammable.

@naisha2307 3 жыл бұрын

Google

@rickrys2729 3 жыл бұрын

I thought you were going to square that value of (1.6 x 10^-10C)?

@radrandall 3 жыл бұрын

She squared it the math, she neglected to write it. .. it happens

@sarthak8802 3 жыл бұрын

Waiting for this one 🥺🥺

@jack0cat 3 жыл бұрын

I have plans for a large Rodin coil. Some strange things happen in the center when a power source is applied.

@theCidisIn 3 жыл бұрын

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.

@brettweerasooriya3776 3 жыл бұрын

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?

@mrhiran29 3 жыл бұрын

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????

@konstantinkurlayev9242 Жыл бұрын

Thank you!

@martf4701 3 жыл бұрын

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.

@martf4701 3 жыл бұрын

@@noeckel could be like that also. Every theory or ways of thinking are good. 👍

@creightonfreeman8059 2 жыл бұрын

So what is the relation between the gravitational field and the warping of SpaceTime?

@iampuzzleman282 3 жыл бұрын

Love the starry Blous!

@calholli 3 жыл бұрын

Sounds like a van gogh painting.

@mahmoudfl5097 3 жыл бұрын

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 🤔🤔

@nesomalinar5662 3 жыл бұрын

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 👋

@nikunjdeepupadhyay5058 3 жыл бұрын

Miss Dianna me Nikunj Deep Upadhyay is your obedient Indian student it's my humble request kindly make video on radioactivity

@leightonwestbury92 3 жыл бұрын

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

@MuhammadDaudkhanTV100 3 жыл бұрын

Amazing

@valterhilden7219 3 жыл бұрын

Do you know the difference between a seal and a sea lion? A seal ion is a seal that lost an electron.

@jerryfick613 3 жыл бұрын

Groan... P.S. stealing.

@santiagomarino9233 2 жыл бұрын

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!

@Bassotronics 3 жыл бұрын

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.

@calholli 3 жыл бұрын

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.

@Bassotronics 3 жыл бұрын

@ *calholli* Thanks calholli.

@victormultanen1981 3 жыл бұрын

cool fun video, thanks

@Shihab1979 3 жыл бұрын

Thanks so so much mam. 🙏

@JV-pq3qn 3 жыл бұрын

I wish that some space museum would show the earths magnetic field in a hologram so we can see it in 3D and the earths gravity also in to show that it's not on a rubber sheet so people can imagine what what the actual bending of space/Time would look like

@cxffaye 3 жыл бұрын

This is so much better than online classes

@ThingEngineer 3 жыл бұрын

Shockingly informative⚡️

@burkean 3 жыл бұрын

So, Benjamin Franklin is the one who named the positive and negative charges. Is he also the one who got the direction of current wrong? BTW 20:30 you say 4.4 times 10 to the minus 5. You meant minus 4.4 times 10 to the 5. That had me puzzled for a while. (Lightening happens at 5 times 10 to the minus 4?!?)

@konstantinanikin5799 3 жыл бұрын

Isn't electromagnetic field a kind of medium in quantum sense?

@John_vDongen Жыл бұрын

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 !!!

@MuhammadDaudkhanTV100 3 жыл бұрын

Woo superbly

@manjeet6733 3 жыл бұрын

मस्त लगा विडियो 👍

@yoavboaz1078 3 жыл бұрын

is mass gravitional-charge?

@ptyptypty3 3 жыл бұрын

shouldn't the Charge be SQUARED in your example for Force between an electron and a proton at 1 nM distance?

@radrandall 3 жыл бұрын

She mentioned that it was squared, but she neglected to write it. The math, however, is correct. .. human error

@tysondog843 3 жыл бұрын

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.

@thercbartee 2 жыл бұрын

Great stuff! What blows my mind is that every bit of storage making up the memory in our phones has a capacitor. So there are billions of capacitors in our pockets!