Lec 2 | MIT 5.111 Principles of Chemical Science, Fall 2005

[zeroMPUA]

Thank you so much for uploading the video

[zeroMPUA]

She is gourgeous, isn't she?

[dgeramie1]

this video is cool cool

[MassimoPiai]

33:30 is a bit of a crude observation... by the same token the moon wold collapse upon the earth in a few hours. not enough to reject classical mechanics.

[realisticspeakers]

backscattered

bae.....ae......scaettered!

[Rananka]

Awesome professor. It's very rare to see someone attempting to explain these concepts and ways of thinking in science and scientific experiment with such passion and empathy.

Thanks Prof Ceyer and MIT for sharing this.

[Alubrab]

that girl at 20:17 hopes that nobody recorded her throw on video tape

[lilyroxmysox]

Her voice annoys me, I can't even concentrate on the teachings.

[gomunkul]

first i watched the lectures by Donald Sadoway, and now when i watch this lecture it seems like a freshman who had very little time to prepare is teaching me...

[iamsnail]

Does anyone know what is the book used at this class?

[iamaar0n]

Her voice is annoying but I started paying more attention at 3:56 :) She's a good speaker.

[kroflinkristian]

Now to the topic: the experiment´s whether kept in ratio nor in the fact that the decaying

element doesn´t at first aim where it´s shooting at.

The whole concept of this lecture is based on the hypocritic idea of "curing other people". Who survives and who dies can only be shifted. There´ll never be an advance. The ratio of dying and surviving people always stays the same. Now try to verify or confute that.

[kroflinkristian]

I really have to try that, too. Using a child not to only make me look more sympath(et)ic but also to show how powerful I am. Wait. I am a male. I at least have to take two children, I must´ve taken them from an orphanage, must´ve lost my wife du to cancer while I myself lost both legs and one pair of testicles in a car accident. Just recognize how less they say about the topic and how often they mention the nobel diversion... Let´s go back to Mrs. Ceyers´ lectures...

[brianmenendez]

i think the camera guy had too much coffee when he/she filmed this

[Maird79]

). I am suggesting this because of the distribution anomalies that the gold may have on the H++ particles. Plus the number H++ particles deflected beyond the pick up radius or the principle detector. At the other side of the gold foil?

[Maird79]

Why didn't the staggering number of H++ particles strip away a staggering number of e- particles from the s and p orbitals radically changing the ionic state of the gold atoms at the epicentre of the bombardment. plus shouldn't the equation for calculating the back scatter be derived from all the possible surface area routes the backs scatter could possible take, and not only small area the sensor material occupied (approx= 1% of the total back scatter probability).

[gotaway2eatsoup]

I never had physics before.... Is the purpose of the last lecture to show why newtonian physics does not apply to atoms?

[aaaaaaleon]

her english is kinda hard to understand >.>

[Iboxx]

Where are you from?

[aaaaaaleon]

i live in canada

but i was brought up in hong kong:/

[exfalsoquodlibet]

How did Rutherford know how many atoms there are in the gold foil?

[paisiello2]

Avogrado's Constant

[QueenOfSkeets]

She is great.I would have loved to take her classes. I heard the same story back in university days and it was soooooooo boring..I hated the name Rutherford. Now I think it's not so bad:)

[sharinganclan213]

can you ask questions? lol

[obeliskbreaker]

Yay! Recess!

[stillahu]

This professor really likes moving around, a little distracting though. The camera must also move a lot to track her down, but she's in all interesting and vivid. Like it. The lesson is sort of a chemical science history.

[blueshadow1996]

these are interesting....,,thank you..

[arkmalfius]

I don't even go to MIT(and know little of Chemistry), but that class looks fun. I liked the video. Strange...I can learn something well that I don't need..but have trouble with stuff I do need.

[musikpal]

I didn't like physics until I began working on a car and until I burned a stereo as I installed it. I didn't pay close attention to economy until recently when it turned really bad. Without being able to relate a subject to reality or use it practically, it's hard to be motivated. So go get yourself in troubles, troubles that related to your major. Or may be u need to switch your major.... to this.

[Strz4life2]

How come your video is 35 minutes long and it still remains?

[musikpal]

One may be a Nobel Prize winner, but u may not be equipped to teach. There are many things Dr. Sylvia Ceyer was born to to be, but I know one of them is....she was born to teach, my most favorite chem instructor.

[do0me0nice]

I agree with you. She's a joy to watch. I get this warm tingly feeling when she talks. She reminds me of my mother when she would read me story books!

[aznthi3fzilla]

lol i hear u bro

[edayxe]

Too bad the person shooting this video did not zoom in to where the teacher is pointing.

When the teacher is using the computer to show a slide or a graph on the screen, the video person shoots at the teacher instead of zooming into the screen. So the class can see the screen but the Youtube audience can only look at the teacher. Too bad.

[bomberfun1]

@edayxe the cameraman is indeed unprofessional. Just comes there to kill some time.

[amrosik]

@edayxe...and for this reason, we can also watch these lectures through our asses, with the same education experience gained afterwards.

[0112330]

1. Great lecture. A really good professor should be able to teach you the material entirely through lecture. You shouldn't have to read the textbook.

2. But I wish she would stop walking around like that. It is distracting. I mean, this is a chemistry class not an aerobics class. She can burn those calories after lecture on her own time.

[LeBadman]

@0112330 People remember things much better if good bodylanguage is used. Did you ever study communication skills?

[baard]

This is great! I just wish the cameraman could capture the screen rather than the lecturer whenever she refers to images and such...

[WORLDREIGN]

I have a question. How come centrifugal forces arent factored in with Newtons second law. I mean, the electrons are orbiting the nucleus at great speed right? If we factored that in, then an opposite force would keep the electron from destroying the atom. Like planets orbit the sun. Is is possible to know where an electron is, I don't think so. Is it possible to deturmine it's speed and direction without knowing where it is, hell no! But if we could, wouldn't classical physics work? I dunno. hlp

[ayeaye360]

I think the electrons don't actually "orbit" the nucleus like planets,they are found in orbitals which are just the region of space in which an electron will be found 95% of the time.They are around the nucleus but not orbiting it,so centrifugal forces don't matter.If you werent looking for an answer,just ignore what I said.I'm mostly typing this to clear things up for myself.Total beginner in this.

[WORLDREIGN]

I would like to say that she is one of the better teachers out there! She really has her shit together, (I use "shit" so save myself from a rhetorical re-explanation of the last lecture, take it easy nerd boys!) and feeds you knowledge through the minds of the Scientists as if you were in their shoes. I really feel connected to that! Even with her voice, there needs to be more teachers with this same passion to teach, and as well organized as she is! Grats to MIT for this winner.

[asupara4418]

r=r(t) is not a common sense to the audience or the syudents, I think.

[F00dTube]

6:10 Twenty alpha particle per minute. You are 'ticking' too fast. :P Truly great lectures. The material being explained in the same perspective the discoverers had.

[wexarexthexStorm]

"I just have to blow my nose"

"Yea yea go"

Love these levtures

[isobelpoe]

I am going to watch each of these lectures (along with book study and online quizzes) and then take a test to see what I learned. This is very exciting.

[charlesdarwinxxx]

all a college does is sell Admit tickets to class.

1. Yes, can come to class.

2. No, cannot come to class.

Digital lectures can be seen by anyone, anytime, anywhere, any computer, any internet, any devces.

Digital lectures can be seen by billions, billions, around the world, around the clock for free.

Digital lectures is the future.

[goerizal]

you are exactly right. this reminds me of nikola tesla desire to provide cheap accessible energy to the poor masses of the whole world, not too different from the majority of us who cannot afford to get into MIT for the most commmon reason of lack of affordability. again, thank you for this.

[mremile72]

she's got a rather irritating voice

[legendy2j]

but cant be irratted by the great info.

[vk92007]

@mremile72 Ya na I agree with you. Her voice actually annoys me!

[ekid2k]

I've been playing lectures to help myself fall asleep for the last couple months and this fucker was so interesting I stayed up to watch it