Lec 23 | 8.01 Physics I: Classical Mechanics, Fall 1999

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[Kotik112]

Why can't all teachers be this interesting? My physics teacher just mumbles words and you start day dreaming after a minute :(

[mdiem]

The algebra is really fun in this one.

[MsCblair2]

Thank you. A sound source creates a sound wave of 80 decibels. At one meter from the sound source the intensity of the sound wave is 74 decibels. What is the intensity of the sound wave at two meters?

[TheLittleVirus]

Lol I can't hear about the Doppler effect without imagining Sheldon in his striped costume....

[Askate]

wow hahaha thank you. you beat my ap physics teacher any day of the week

[FelipeZucchetti]

Amazing lecture...thank you...

[proslice56]

@kristijan0kroflin WHATEVER! I WANT YOU TO BELIEVE WHAT EVER YOU WANT TO BELIEVE ... I WAS JUST PASSING THE INFORMATION ALONG.... YOUR THE ONE THAT CAME OFF AS A SMART ASS

[proslice56]

@kristijan0kroflin do you have the ability to check it on your own. silly question. do you have your own super collider . well in france they accellerated particles to the speed of light and the neutrinos were ahead of the light. the news of this find was released on the 23rd smart ass

[proslice56]

with something that travels faster than the speed of light, it is now possible to achieve escape velocity R=Mc2 has got to be revisited. neutrinos are now shown to exceed the speed of light by 20ppm. reported 9/23/11

[mdiem]

@proslice56

There was systematic error in the measurement. Neutrinos do not travel faster than c.

[proslice56]

@mdiem Well if that's true then there is nothing to be excited about. If it were so we would have a new energy source. Back to the drawing board.

[mdiem]

@proslice56 "we would have a new energy source."

There's still solar power - ya' know the stuff that is free from the sky?

[proslice56]

@mdiem water is an energy source as well. the last time i checked, solar power hasn't been that effective in powering the nation. fossil fuel still rules the day. it is my hope that the hydrogen cell can be used as well. It would be a great day if fossil fuel could be eliminated.

[TheSupercat2468]

It has to be a juicy succulent slice cantaloupe. The Doppler shift from blue to red light - my computer screen to my eyes deciphers it as such.

[ultrasonictechnology]

thanks for letting us join

[thebimbettes]

is that a banana on his shirt?

[Casowsky]

Lmao how the hell does he do those dotted lines so fast?!

[theperfectionist]

I was looking up video game reviews on youtube and somehow ended up here i got sucked into this and before I knew it I watched the entire thing though I didn't understand much it was very fun lol

[SQarmand]

@theperfectionist LOL ME TOO, exactly wut happened lmao

[MrKornKid]

@theperfectionist Im in the same boat lol.

[yakamanoying]

2:07 flipping off..

[mdiem]

@yakamanoying

I point like that all the time during my lessons - it's only the 7 year-olds who make a comment about it though.. ;-)

[aqid01]

wow, intressting!

[MarcusAvon2]

I so want a wind organ right now lol

[liquidrunning]

Why am I doing medicine? *This* is so much more interesting.

[thedarkone123123]

@liquidrunning nothing beats medicine, but this lecturer is just enjoyable to listen to

[nextalexklein]

@liquidrunning there's money in medicine though...

[CarbonDioxide1990]

299792458m/s= c

[gameplayer973]

umm am 11 so i think this guy is the smarts person in the world

[Whiteblooded]

Just wondering, how do you get such long videos on here?

[CarbonDioxide1990]

youtube partnership

[Sors]

I just want to know what is on his shirt... looks like a melon.

[bigfhead]

@Sors It's a slice of cantaloupe. MIT is full of fruits and nuts

[gulloogtg]

@Sors PAPAYA

[moreeso]

@Sors i think its ... papaya!

[OJReadMore]

"Just like how the central ring of a storm goes around with a relatively large velocity" is what I meant below:-/

[OJReadMore]

Nature always tends to use spirals to balance itself out. Like on Earth, tornados and hurricanes balance out the pressures in Earth's atmosphere. Could it be that black holes are nature's way of balancing out the pressure on a larger scale?

[safithegr8]

hhmmmm... impressive

[OJReadMore]

So inside the Event Horizon, there's a pull towards the center, that's why light can't escape. But what if the reason isn't that light can't escape, but that light can't enter the event horizon. Just like how the central goes around with a large velocity, could the center of an event horizon just be as calm as the eye of a hurricane?

[Al25401]

Event Horizon, with Sam Neil and that other dude right?

scared the crap out of me when i was like 10

[OJReadMore]

you can watch it here again and enjoy it if you know where to look. The best scientists need time to dream and be creative too.

[MrKornKid]

@OJReadMore neat idea.

[FrankCashio]

I know what Heretics! Prof. Walter Lewin is an incredible professor of physics.

[liveguns]

they obviously aren't as brilliant as this guy is.

[zamedo1]

funny how the # of students attending just dropped from the first lecture-lazy ppl