Introduction to Pressure & Fluids - Physics Practice Problems

[@TheOrganicChemistryTutor]

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[@nicoleescobar8430]

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[@nicoleescobar8430]

@@sukumar.s1361 Honduras

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For me, since 7th grade lol

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Are you doing your third year now.?

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[@MYSTIQUE2002]

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[@E75-m1v]

This is another lesson that i have a exam for in less than 1 hour this vid saved me

[@edgarfranco367]

Amazing. Thank you! You got me started on the penultimate chapter of my mechanics class. I was feeling hopeless. Not anymore :)

[@shirazunakajima7944]

7:58, do these numbers make sense? No. Do they serve their purpose? Absolutely! Great explanation and content, sir!

[@bones9726]

your my favorite teacher

[@HakanYalcintas]

I have a physics test and I was struggling with understanding the concept of pressure but your videos man are the life saver. Thanks brotha 🙏

[@lowquality_zaza.]

same broo

[@nickraifmai9772]

Bro you're a life saver.. you earned yourself a new sub :)

[@tomatrix7525]

Being extremely picky, at 7:00 the problem does not allow us the find the surface area technically. You are assuming the dimensions are in the order l x w x h but while this is the standard way, multiplication is commutative so it may not be in that order. The area of the base could be 6(5) for instance. Question should perhaps have been more specific

[@beautifulday1665]

At the end when substituting in the pressure equation, you WILL multiply ALL of them sooo....

[@passionworld2054]

That's true bro, if the problem were more specified I would get the correct answer but no worries

[@amrojjeh]

@@beautifulday1665 Only two variables cancel, leaving one in the numerator. Depending on what you choose height to be, you can get a different answer

[@taaha6335]

Damn this guy explained it like a proooo

[@roll1112]

The all world salutes you sir❤

[@olalekanjuma4687]

You are a wonderful man.Grateful if you could simplify balancing equations in chemistry like this.❤

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you helped me through physics 1 last semester, now onto physics 2 haha

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Phenomenal. You're just great at teaching!!!! You always handle things with a light touch

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[@arina4631]

THANK YOU SO MUCH! YOU'RE THE BEST!

[@chocochomzy5031]

Thank you for the simplicity of this calculation ❤

[@joeryvandamme5732]

such a simple concept, yet blew my mind. thanks

[@ZULFERISYAHPUTRA]

Dear Sir............Example Problem : One hydraulic cylinder, the end is connected to the Threaded rod so that it can be rotated. Cylinders with a bore size of 18 mm, 10 mm rod and a stroke of 300 mm single acting in a condition that is filled with oil. If the cylinder is rotated 10 mm. a. How to calculate it b. What is the gauge pressure

[@yonathanabuhay3584]

My teacher gives me the questions that is exactly like yours and I have got two marks cuz of you tnx

[@yosef4742]

Pretty straightforward. Thanks 👏

[@sisandamkhonta7365]

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[@Eric-sq4hd]

Sal Khan is so freaking confusing. JG just relaxes my brain and clears everything up.

[@rajegaming7210]

who is Sal Khan btw

[@rajegaming7210]

is he from khan academy

[@mubashirmuneerfanclub9064]

@@rajegaming7210 yes

[@mahmoudahmedramadan1651]

Thanks man ! You really my best teacher ❤️

[@komranbehbehani6379]

I can't say thanks enough!

[@roll1112]

I hve become so dependent on you that I don't understand things if not explained by you 😅

[@vinci7667]

am i the only one who don't understand this no matter how hard i try

[@charnethekisho7749]

nope me too😢😢

[@delightmkhabela6760]

Yes

[@Trshbowt-gj6si]

Omg same wtf 😭🙏

[@sarahjoan2132]

Thakyou so muchh!Your videos help me a lot in my academics!

[@GamerKidofficial]

May God bless you mann

[@atermajok1194]

Thanks teacher you are the best

[@jorgeeduardocarrenozapata4243]

P is not equal to F/A, it is the component of F perpendicular to the A divided by the A.

[@lordofcows8529]

its implied to mean that

[@brandonfrancoyt]

Who else is here the night before finals😊

[@saidmohamed8598]

Me

[@magaigatelly2561]

thanks so much you such a good person

[@PixelPulse03]

thank you for the great explanation!

[@CristaRonaldo7]

Great, this really helped me!

[@doriangreg1601]

we have an exam tomorrow and the teacher never even mentioned pressure ;-;

[@Shackled]

Good stuff, thank you! However on the last example, why would one assume that you would use 9.8 for gravity again when we were initially told that the gravity of the fluid was 1.7? Would gravity not be uniform?

[@nilasubramani2820]

Specific gravity is actually the relative density of a substance, therefore he used that value to calculate the density of the fluid. Whereas the gravity of the fluid is always 9.8, due to the gravitational force from earth. PS. Someone please correct me if I am wrong

[@beautifulday1665]

@@nilasubramani2820 you're absolutely right..... we have to differentiate between " the specific gravity OF A FLUID " AND " *_THE ACCELERATIONAL GRAVITY or, in other words, the gravitational force from earth...._* ...

[@OjinSZ]

@@beautifulday1665 Ahh i see, thx for explaining i was so confused before

[@anshuman6243]

Nice 👍 video I want to correct you in the first numerical. You wrote block and further you wrote book . Nevertheless, your video is the showcase of your efforts.👍🏻👍🏻👍🏻👍🏻

[@adanibrahim]

Thanks

[@davidekekezie5436]

LIFE SAVER

[@fatimaalfehaid]

Thank You..All the best

[@anexperiment6710]

Thank you

[@cabdicabdilaahi6481]

Thank you so much ❤❤❤❤❤

[@Foasperfect]

يارب انك تسلم 🩵

[@adityaranjanroll2ixa668]

Thanku sirr

[@TEACHER.CLEOPHAS]

Great lesson.

[@sharifluttamaguzi9872]

why would you use 9.8ms-2 instead of 10ms-2 don't you think some people may get confused because some of them may not know that you round of to get 10. But anyway.....it was a useful video to me.....hit the like button if you agree

[@zoro-i]

I don’t understand this. Why ph20= 1000kg ?

[@ericyeboah6011]

Nice one

[@juwairiyahayub3436]

Thanks a lot,

[@michaelmarkmalgwi720]

that is great bro.

[@sithuvidu1187]

Thank u 🙏

[@renenarcissebeyongol3467]

this pressure thing is so complicated

[@Tortle07]

writing this hours before my exam, hopefully i dont have to come back for the retake exam...

[@shahmeeriqbal9073]

Um, look in the first example what if we take force 150 N since from kg to N multiply by 10.. And the area as 70 multiply by 40 = 2800cm. 2800/100= 28m So P=F/A P=150/28=5.35 which is different from ur answer. Whyy??

[@theduckmugnielsen7038]

This is because area is measured in square meters. You have to divide by 100x100 to get from square cm to square meters. NOT 100. Hope this helps:)

[@mrmotion7942]

I thought the same 70cm * 40cm = 2800cm = 28m 0.7m * 0.4m = 0.28m ?

[@mrmotion7942]

@@theduckmugnielsen7038 Yes yes yes. Thanks. I just realised. :D:D:D:D Thanks so much

[@keikay2733]

very good video thanks a lot

[@manafovamariyam7496]

really useful

[@TekleAssefa]

I love physics so much🥰🥰

[@coffeeeeaddict]

You’re the best 🤩

[@loves2spooch26]

good stuff

[@TheOrganicChemistryTutor]

Thanks

[@animeisaculture5556]

Good job explaining :)

[@user-kg6fm7cn4j]

How did you get 9.8 as the gravitational acceleration?

[@amrojjeh]

It's one of those things you gotta remember! Essentially though, you get it from a few experiments. But because it's roughly the same number wherever you are on earth, it's become more practical to memorize it than to calculate it every time.

[@dennys288]

good

[@YauweJoe]

Very helpful .Thanks alot.

[@loves2spooch26]

why dont you plug in 1.7 for g since its the specific gravity of the fluid?

[@theduckmugnielsen7038]

Gravity and gravitational acceleration is now the same

[@iorkyaseaondofa9828]

thanks a lot I appreciate you, you are very nice

[@كنكتبحت]

I love you man

[@gillesR337]

really good video, I like it!

[@renenarcissebeyongol3467]

i did understand any thing\

[@StephenAbilli]

everything is clear

[@beylayboy7267]

How is the book 15kg 🤷‍♀️

[@fadul7026]

Can someone explain why he made it mg/A and whats mg

[@karanmaan31]

Force = mass x gravity F = m x g , where m = mass and g = gravity Pressure = Force / Area P= mg/A

[@boubacarsidicoulibaly3124]

For the last case can someone explain it to me? In the exercise they gave the specific gravity of the fluid which is equal to 1,7N/m³. And we know the specific gravity(noted gamma) is related to the acceleration(g) by the following formula: gamma= (rho)×g For the pressure: P= (rho)×g×h thus P= gamma×h My question is why did he take the density of the water to calculate the pressure if the specific gravity is already given? Please i'm a little bit confused. Thanks in advance for helping me

[@adibaltahsin2305]

I owe you 10000 kPa!!

[@AndresGarcia-cl6td]

in the last one what happens with the area?

[@gnation855]

Pls is the pressure in the middle of a container the same as in the bottom or we have to divide the pressure by 2

[@gnation855]

Pls do reply my question

[@patmmwiinga]

Why can't we use the gravity for on earth 10

[@moviesandseries2320]

It became newton because the unit of pressure is N/M

[@ghgjftythnhcfghdty]

The leff times the whiff?

[@xahmed9464]

ghgjftythnhcfchdty? more like zsiedufhseaklrjgnjksbgisdfhuisdfhaskjrbgzsdjhhbsdjfgh

[@blindside9921]

can i ask how do you find the pressure on top

[@hunkidiego9282]

No haré why is our teacher showing us this

[@lilxtasy4936]

DONT RUSH NO PRESSURE -justin bieber

[@Juwar1974]

Wait a second. I'm confused about the last problem. What about the area? Don't we still need the area of the cylinder since Pressure = Force / Area? Why wasn't area calculated?

[@thetranscendent7825]

the length and width canceled each other out. He just skipped that part

[@mostonphiri2756]

Consider the second example where he derived that formula of pgh

[@joeryvandamme5732]

this is interesting.

[@malekstudies0944]

in 4:27, why do you convert cm to m? is it because we want a value closest to a one digit number or? I dont understand

[@imhypedyt]

pressure is force (SI units would be N) over area (SI units would be m^2). If he had used cm^2 instead of m^2, it would have given him an inaccurate result.

[@aronkebede1731]

you know bro tnx so much./be blassed...

[@iorkyaseaondofa9828]

please, how long does it take to fill a swimming pool 7.5m times 18.0m with an average depth of 3.5m, if the water flows from a pipe of 1.5cm diameter with a speed of 1.5m/s?

[@d3ixi]

What’s the reference

[@kumarrahuma9890]

am confused from mg

[@harrytv8302]

So if we deal pressure in water, area is disregarded as the first example if the area increases, the pressure decreases. So if i put a 2m x 3m rectangular block at a depth of 20m below water surface and another block with 10m x 20m, the pressure applied to both rectanguar block are the same, is that correct?

[@natspro5411]

Thanks but where hv u got the pressure on no. 1

[@ahnaf_akif_mbbs_bd_ksa]

sir , do we have to use h= 3 m because of the concept : center of mass at question 2