Class 11 Physics | Heat Transfer | #11 Concept of Freezing of a Lake | For JEE & NEET

[@watermello8790]

11yrs and still gold..cant express in words how much your online videos have helped me, sir..much much respect and love😊😊

[@Taylor-wc3jw]

Brilliant, thank you sir.

[@physicsgalaxyworld]

+Taylor Ford Thanks for appreciation... I am happy that students are getting benefit from my videos...

[@anmolempire1197]

@@physicsgalaxyworld it's our pleasure legend sir 💞

[@vishnusuresh9277]

Thank you sir after 9 yrs🙂😇

[@raginigupta4440]

sir how we taking this situation as steady state won't ice will absorb heat.

[@physicsgalaxyworld]

Because given temperatures are constant, we consider steady state and in steady state ice will not absorb any heat...

[@ponderr]

I am 8 year late 😔😔😔 But still happy being here

[@FyzisistGaming]

I am 10 years late bro 💀💀

[@ponderr]

@@FyzisistGaming 🤣🤣

[@ponderr]

Iit me aajao fir bhool jaoge

[@FyzisistGaming]

@@ponderr nehi bhai iit nehi jana mujhe wahat padhna parega waha jake. Waise ap kaunsa college mein ho abhi?

[@ctn4738]

It is never too late

[@arshad2295]

11 years back 😢

[@ItzAyush5215]

To kya ho gaya

[@Abc-nz7hm]

Thanx a lotttt sir I saw such problem in hc verma but loose hope as I couldn't solve it after attempting many time but now I got it in minutes

[@tusharagarwal749]

The temperature of frozen ice is 0°C . That is temperature is constant from x=0 to x=x' below. Which means temperature gradient is zero. So how come heat current equation is applied across the ice bar ? It seems reasonable whenthe topmost surface of ice is at surrounding temperature and below is zero. But that is not the case here. PLEASE EXPLAIN (WAITING FOR YOUR FAST REPLY)

[@adityaachari3336]

Tushar Agarwal No. The temperature of the entire slab of ice is not 0. The layer of kce in contact with water has temperature 0 The entire slab of ice has a temperature gradient from 0 near water to -T near air

[@madeinheaven8768]

Ok got it👍🏻👍🏻👍🏻👍🏻

[@shivamverma9447]

Dear sir. I was a marvelous explanation 💙🙏

[@niralipatel5346]

Even m watching this series rn. I think this videos are worth of millions of views !

[@shivamverma9447]

@@niralipatel5346 yes you are correct. I am watching these videos for quick recap for adv 2020

[@jee_aspirant_ISR]

Thank you sir muje ab samaj aya🙏

[@rawstick4307]

Sir you are amazing 👏 Thanks a ton.

[@prernasinghchauhan8987]

Well explained, thanks sir

[@sutaptagupta4902]

Sir what we take for value of density either it is of ice or water?

[@raantas946]

This sounds like sir was explaining it from a well

[@rajuguide3326]

Sir have you considered "A" as the cross sectional area of x region or dx region

[@ujjwalkumarsingh812]

A is the cross sectional area of the floor of the lake which is same for dx region or x region

[@bhuwanbisht2488]

thank you, sir, its help me a lot.

[@hamarehutiyape2229]

Osm sir....thank u so much....plz keep posting more videos....

[@iamsatyam6407]

This video helped a lot.Thank you

[@aspiringscientist1616]

Sir why have we used the density of ice instead of the density of water???

[@akhil6826]

Since we took that dx element to be frozen

[@dpjbdpjb]

does this apply to swimming pools?

[@mukulgupta4806]

Sir this is the condition when water of the lake is at 0-degree centigrade ??

[@physicsgalaxyworld]

Water of freezing lake is always at 0°C at the bottom surface of ice...

[@mukulgupta4806]

OKAY SIR THANKS

[@abdulrashed9877]

You are just excellent! Sir.

[@jigneshpatel875]

does time depend on depth of lake ?

[@physicsgalaxyworld]

Yes... see the final result...

[@pm7870]

Great explanation :-)😍

[@calculus3097]

Hey in which college u r studying?

[@itachu.]

@@calculus3097 doesn't really matters , do your best by the way.

[@Dilip_kumar5]

Good work

[@Dilip_kumar5]

Waah kya comment kiya h aapne

[@NAYAN-t3e]

Around 3:50, Is that freezing problem a steady state problem ?? Because, ice can be formed steadily at constant temperature. Plz, anybody has elaboration can share.

[@PiyaAgarwal-id2ii]

No the temperature is not constant, but the layer of ice is at 0C so the net difference between the temperatures becomes T only

[@hamarehutiyape2229]

Sir......why the area of initialy frozen heat and the ice that froze afterwards has been taken same??? It should be different.......so...we cannot cancel A from LHS and RHS....

[@ujjwalkumarsingh812]

A is the area of the floor of the lake

[@anmolempire1197]

Sir *X* is length of conductor, but here it's representing distance between layers.how can Physically it correct?

[@K_PRIYAM]

after freezing x distance, when dx freezes, heat released which goes to the atmosphere after going through x distance of ice that's why sir has taken x.

[@freeverse4210]

I would say this is teaching masterpiece

[@farzee]

thanks sir

[@alphaiitd1]

Great explanation

[@viraljain1558]

Why dx is considered

[@nabeelkhan4910]

What a bout conduction through water

[@soumya2869]

🙏🙏🙏🙏🙏

[@anujkhare3815]

sir . your videos are awesome. but don't you think that they don't serve their full purpose as students generally dont catch English subtly. it would've been quite good if you teach in hindi as medium of instruction keeping terms in English. like this "blackbody WO hoti hai Jo Sab kuchh absorb kar le " I hope Maine kuchh galat no bola kyunki mere jaise buhut log use jyada gain kar sakenge. English me samajh aata hai magar feel in aati. pls sir Hindi edition jaldi laao

[@physicsgalaxyworld]

No... I don't think so... there is a global accent video also there for each video which are used extensively in USA and Europe and they get a good feel... because these videos are to-the-point for understanding physics...however we are making videos in hindi separately for people like you... which will be uploaded later in 2017...

[@kylenovak4764]

What are the units of time?

[@srimansg2800]

Unit of Time is "Jiffy"

[@kamaldeepkaur7341]

Why the water in lake is considered to be at 0 degree .Can’t it be negative ?

[@SaiTeja-oo3dv]

If it is negative it would be ice not water

[@nishkritipriya]

Anyone for neet 2025

[@masoomladka8017]

Op

[@easytipsandknowledge7243]

Please speak in hindi if you cant speak English well 😅😅😅

[@kshitiz6376]

There is nothing wrong with his english. (-_-)

[@004_Aravind-yy1jm]

🤫🤫🤫

[@mamtachadda8831]

Fake

[@VinMeeEducation]

What fake?

[@ujjwalkumarsingh812]

Are u Telling ur description?

[@jerryshao142]

Thank you sir

[@derekgozel5064]

Thank you sir.

[@sathvikmalgikar2842]

Thank you sir

[@rasasushi]

Thank you sir