Fluids (part 4)

[zakayron8001]

just so no one memorizes it wrong: 1 atm= 101325 Pascals not 103000

[kami645464]

Isn't 1 atm = 101325 ~ 101000 ? Or am I getting this wrong ?

[TurbotortoiseStickle]

Thank you, I'm actually having fun with this.

[izzyAKAisra]

in my physics class my professor drew the same thing and everyone thought he was drawing a DiICK! Guess what the professor said! : " I dont know where you get that from but that's not physics(Russian accent )

[joel7308]

u r great, thank u, other parts r also good

[Helllocutiepie]

LISTEN TO SAL, THE HARDEST PART IS TO MAKE SURE YOUR UNITS ARE RIGHT!!!!!!!!!!!!!!!!!! DON'T FORGET THAT!!! You will get a wrong answer in the test if you do. It will hurt a lot because one may think "wow I watched the whole video and understood it" and then one misses the smallest detail possible and it counts 0. Good vid.

[dinmorerengeit]

is it just me or does the units not work out..?

isnt N= m*a = kg*m/s^2?

N =/= kg*m^2/s

wich means he will not end up with .77m in his answer..

[hermanhjaramillo]

@dinmorerengeit

You are right. The error was in his part when he said that an atmosphere was 103000 N/m^3, (almost at the end)

while it is actually 103000 N/m^2

[bubshab]

Think you got your atm to pascal conversion wrong buddy. Cheers for the vid anyways.

[jonrty007]

Isn't 1 atm = 101.325 kPa or 101,325 Pa? :O

Other than that. You are probably one of, if not, the greatest Physics teachers alive.

[2007excalibur2007]

@jonrty007 If he needed to round it off he could've at least just used 10^5 Pa, lawl.

[g37muflih]

why cant we call the atmospheric pressure as atmospheric force

[2007excalibur2007]

@g37muflih The same reason why we can't call pressure as force.

[thienfoil]

@g37muflih force has to do with mass and accel/gravity. Pressure is force over an area. Force doesnt need to stay constant, but pressure in liquid does.

[VSmassacre]

"Let me draw a bowl...a bowl.. And in this bowl i have Mercury"

-LOL

[buddahmunk99]

i love it when you have to abuptly end your videos and thanks for all of the help!!!!!!!!!!!!!!!!!!!!!!

[VmanLee]

haha "Vacuuuuuuuum, one of my favorite words because it has two Us.... What was I doing? Oh yeah!"

[livinglove2005]

Ehm, in the formula (bottom right hand corner, you wrote 103,000N/m^3, when it should be m^2 :)...

Thanks a lot Sal!!!!

[livinglove2005]

Ehm, in the formula (bottom right hand corner, you wrote 103,000N/m^3, when it should be m^2 :)...

Thanks a lot Sal!!!!

[thelastbattle19]

WOW

[442Alec]

lol test tube looks like a willy

[lucasmontec]

It's still mercury:?

[Joikakaker]

Why are you defining 1 atm as being at sealevel in Paris, France? It's not constant there, nor is it constant anywhere else. I guess you already know this, and I guess you just say it to simplify things, but it's quite important to know that pressure is dynamic (hence our dynamic weather)

[jiggaluv123]

@Joikakaker Yea, no shit it's dynamic. I hope you noticed that this is not an engineering type physics lecture, rather it's just the most basic, simple physics. Why complicate things even further when concepts are most important?

[Joikakaker]

@jiggaluv123 I wouldn't say that saying that pressure is dynamic is very complicated, rather quite intuitive

[spikeyredcactus]

6:05 ALUMINIUM foil not alu-minum foil, otherwise thankyou lol

[seekdragonflies]

he is talking about mercury when he refers to 13.6 g/cm^3 or 13,600 kg/m^3 which is the density of mercury :)

[srkfanaticism]

1 N = 1kgm/s^2 :|

And the value of 1 atm = 1.013 * 10^5 :|

Plus u cancelled the wrong values for the units :|

[blackbullet4749]

Thats close enough for this purpose.

[chazmichaelsm]

1 atm is equal to 101.3 kPa not 103 kPa, just a heads up. But very, very helpful video. I was sick for a day in AP physics and this caught me up

[calebcar]

This series is wonderful. I'm taking an on line ap physics course and there is no audiovisual. You are a life saver.

One thing I don't understand. I did not see that you made reference to the diameter of the test tube. If the test tube took up almost the entire diameter of the bowl the mercury was in, wouldn't you have a tiny surface area of air pushing a large surface of mercury up. Why does the height not depend on the relative surface area of air and mercury?

[laloksdm]

i tried not to laugh when my teacher explained this.

[samGenius4]

i cant believe im sayin dis(coz i HATED physics) but im starting to love it! Yikes!

[asherzephyr]

So does the mercury go into the tube because the atmospheric pressure basically pushes it into the tube?

[maybeok1]

this is waaaayyyyyyy better than my physics teacher.

[SecretAsianMan7]

1N=1kgm/s^2

[coltwhat]

i thought 1 atm = 101300 Pa? =S

[bordenw]

That is true but there is 1000pa in one KpA, MOVE THE DECIMAL PLACE TO THE RIGHT AND YOU WILL OBTAIN 101,300PA. SAL WAS CORRECT

[faith8789]

Hey, I really like your vids. But 1 atm = 101.3 kPa