(Graph) Newton's Law of Cooling And find Cooling Constant. |XII PHY Experiments| (Urdu/Hindi)

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Khan Affan

Khan Affan

6 жыл бұрын

Objective: (Graph) To verify Newton's Law of Cooling And also find Cooling Constant at 5th, 10th, 15th and 20th minutes.
Link for Animation: ( • Newton's Law of Coolin... )
Class: XII - PHY (Experiments)
Board: Sindh Board
Language: Urdu/Hindi for explanation & English for writing
XI - Physics (Experiments): [ • XI - Physics (Experime... ]
XII - Physics (Experiments): ( • XII - Physics (Experim... )
Let us know in comments your feedback, answer to questions asked in the video and further suggestion for the future topics.
Contact Info:
-Website: www.promotephysics.com
-Email: affan_414@live.com; affank414@gmail.com;
-Facebook Page: Physics with Khan M.Affan
( / phywithkhan )
-Instagram: khan.maffan
The whole idea of delivering these online lecture is to
-Provide a free facility to those students who might not have resources to engage with well known Expensive Physics Teacher
-Place a Conceptual Teaching Trend in Pakistan.
These lectures can also be delivered to those students who doesn't have internet facility (in Pakistan), if you know any of these students let us know, we will deliver them by ourselves.
Hope you enjoy doing Physics while watching these lectures.

Пікірлер: 185
@trgraza4038
@trgraza4038 5 жыл бұрын
Kon kon practicals ke lie aaya h 🤣 angootha lagao 😅😅
@vaiebhavpatil2340
@vaiebhavpatil2340 4 жыл бұрын
Anyone for 2020 practicals?
@hellboygaming1387
@hellboygaming1387 5 күн бұрын
2024
@rabiyajameel5287
@rabiyajameel5287 2 жыл бұрын
Seriously a man with zero percent attitude .....may Allah Bless you ♥️
@husbanburney2789
@husbanburney2789 5 жыл бұрын
You have clearly put in alot of effort over this video.... And explained it in a really amazing way.. Hats off!
@nidamaahi4822
@nidamaahi4822 5 жыл бұрын
You explained so well .its really clear all the concepts of mine .thanks alot
@meghnashukla3973
@meghnashukla3973 5 жыл бұрын
Thank you so much it helped a lot!!!keep going sir😀
@areebarana6184
@areebarana6184 5 жыл бұрын
Sir i appreciate you aapne students ki bhhhht help kia hai thank you so much
@malihajaved6512
@malihajaved6512 6 жыл бұрын
Thank u .....that helps me alot💖💖💖
@gauravjha1061
@gauravjha1061 4 жыл бұрын
Sir you are genius you have cleary put a lot of efforts. Thankyu sir
@alishbaafroz4146
@alishbaafroz4146 2 жыл бұрын
Jazak Allah sir ❤️
@tehreemtahir4959
@tehreemtahir4959 6 күн бұрын
JazakAllah
@mylittleworld1668
@mylittleworld1668 5 жыл бұрын
Sir ap boht acha samjhaty hai sary points clear hogay thank you so much😊
@HamzaKhan-ti7su
@HamzaKhan-ti7su 2 жыл бұрын
Love you sir you clear my donuts❤️
@nisarkhankhan227
@nisarkhankhan227 2 жыл бұрын
Jazakallah sir
@魔鬼似的
@魔鬼似的 2 жыл бұрын
great finally found what i was scearching for
@aimiikhan1616
@aimiikhan1616 5 жыл бұрын
Thankx .❤
@huzaifaawais9274
@huzaifaawais9274 6 жыл бұрын
Good Work there :D
@manahilahmed39
@manahilahmed39 6 жыл бұрын
thank you so much 👍
@a.khalique149
@a.khalique149 4 жыл бұрын
Brother thank you for this but there are 3 graphs we have to draw...
@khan_affan
@khan_affan 4 жыл бұрын
Kindly let us know which Board you are following so we may guide further.... Sorry for being late...
@artilonare1712
@artilonare1712 4 жыл бұрын
Thanks sir ji 🙏🏻
@anuragtiwari2098
@anuragtiwari2098 5 жыл бұрын
Sir Thank You very much for both the videos on Newtons laws of Cooling. they have immensely helped me in my project. keep making videos on ISC & CBSE practical videos . thanks again
@areebarao847
@areebarao847 3 жыл бұрын
Thank you sir for the amazing video
@ritujadhav3626
@ritujadhav3626 4 жыл бұрын
It was really helpful thank you
@shivrajdaund66
@shivrajdaund66 5 жыл бұрын
Thanks 😘 Very helpful
@_RahulDalvi
@_RahulDalvi 5 жыл бұрын
Thanks very helpful
@sarazahid4496
@sarazahid4496 2 жыл бұрын
Thank you Soo Much 🌟 Sir very well explained 💯🎀🥺👌
@hridyanshu3460
@hridyanshu3460 5 жыл бұрын
sir u r awesome thank u sir
@naziashaikh8420
@naziashaikh8420 5 жыл бұрын
very nice sir thnak u
@alishbafayyaz9082
@alishbafayyaz9082 Жыл бұрын
Assalam alikum sir your explanation is very helpful for me and other students thank you so much sir 😁
@naziashaikh8420
@naziashaikh8420 5 жыл бұрын
plz sir, explain, Zener diode ki reading with graph (1.5)
@cuteangel3048
@cuteangel3048 5 жыл бұрын
Yes sir plzzzzz
@judy_op2245
@judy_op2245 Жыл бұрын
Thanks alot sir 🙂
@adityapandit1987
@adityapandit1987 5 жыл бұрын
Wa sir Best
@EbadAdnan
@EbadAdnan Жыл бұрын
Thank you sir
@dhairyadave1806
@dhairyadave1806 5 жыл бұрын
allahu akbar💣
@Sarikadevi-4
@Sarikadevi-4 Жыл бұрын
Thank u sir 😊🙏
@someonelivingsomewhere3777
@someonelivingsomewhere3777 6 жыл бұрын
thanks
@ashimano8120
@ashimano8120 2 жыл бұрын
You did perfect
@darshan9311
@darshan9311 5 жыл бұрын
Thanx sir ...very helpful kal mera practical hai ....thaNxxxxxxxxxxxxxx
@khan_affan
@khan_affan 5 жыл бұрын
Let me know... How was your Practical?
@isabelledharia8067
@isabelledharia8067 7 күн бұрын
Kl practical hy Mera
@ertuguldirlisaestheticyt8278
@ertuguldirlisaestheticyt8278 2 жыл бұрын
thanks sir
@prathamraut6014
@prathamraut6014 5 жыл бұрын
Sir Maharashtra board ka bhi newtons law of cooling with using mirror bana do . Plss sir
@kinzasyed520
@kinzasyed520 8 күн бұрын
sir agr hum temperature axis me 1 small box equals to one centi hi len or 0.5 ki value kpo s,mall box k beech me lgaden to thk hoga?
@kinzasyed520
@kinzasyed520 8 күн бұрын
plz reply fast sir kl practical h
@khan_affan
@khan_affan 7 күн бұрын
@@kinzasyed520 🙏🙏🙏🙏 Sorry agar practical guzar gya, baqi ye hai k jo aap ne bataya hai wo chal jata hai lekin behtar ye hai k least count k hisab se ek small box ko 0.5 degree celsius hi lein.
@AmmarSports
@AmmarSports Жыл бұрын
Sir zruri hai k line points me hoti hui hi jaye ?
@kurbanalishaikh
@kurbanalishaikh 5 жыл бұрын
mirror wala used nhi hua cooling constat ke liye? & nice video please use scatch pen because pencil dikh nhi rahi bahut zagah par.
@khan_affan
@khan_affan 5 жыл бұрын
Sorry for inconvenience... Didn't realize this while recording... Try to increase the brightness of device, this might help... And we will consider this factor in further recordings...
@rahulkhilchi7803
@rahulkhilchi7803 4 жыл бұрын
ASSALAMVALEKUM BHaiya mera exam 11 bje se shuru ho jaega aur aapki video dekh kr lg rha h ek no jaega tqqqqqqq love u bhaiyAAAA
@khan_affan
@khan_affan 3 жыл бұрын
Kaisa raha exam?
@rahulkhilchi7803
@rahulkhilchi7803 3 жыл бұрын
Op rha,27/30 thanks
@manhbuivan5572
@manhbuivan5572 5 жыл бұрын
Sir plz used any marker plz btw really help full
@aalapvedpathak6672
@aalapvedpathak6672 4 жыл бұрын
Sir, in our book cooling constant is not written but rate of fall of d theta/dt is written. Can you explain it please fast.
@rakeshvalvi5192
@rakeshvalvi5192 4 жыл бұрын
Good
@mahmedkhan4123
@mahmedkhan4123 Жыл бұрын
Aoa sir kal practical hai thanks for help ❤
@khan_affan
@khan_affan Жыл бұрын
🙏🏽❤️... Good Luck dear ...
@Mehwish-uq2hi
@Mehwish-uq2hi 2 жыл бұрын
Thank you soooo muchhhhhh ... Very helpful 🤍✨
@mfawwadali3734
@mfawwadali3734 5 жыл бұрын
kon kon practical ki last night yanha pa aaiya hai .like karo👇
@alizayzaheer1124
@alizayzaheer1124 Жыл бұрын
hum graph ki valur ka diff but karaingay ya obs table se fall of temp mai?
@khan_affan
@khan_affan Жыл бұрын
اپنا سوال تھوڑا کلیئر کریں، میں نہیں سمجھ سکا۔ اور یہ بھی بتائیں ویڈیو میں کس پوائنٹ پر؟
@AmmarSports
@AmmarSports Жыл бұрын
sir graph plot krne k lie temperature ko room temperature se minus krvana hai ya aese hi bnaaden jese nikala tha ??
@Esloques
@Esloques Жыл бұрын
No simple Jo readings ayi thi 70 ,69 wo plot karni hai
@AmmarSports
@AmmarSports Жыл бұрын
@@Esloques pakka ? kch aur to ni krna ?? Bs time k sth Jo readings nikaali hain bs unka graph ?
@Esloques
@Esloques Жыл бұрын
@@AmmarSports yes
@AmmarSports
@AmmarSports Жыл бұрын
@@Esloques Thank u
@sirmuhammadahsan4826
@sirmuhammadahsan4826 6 жыл бұрын
sir graph mai , apny 60 se phly 55 tw consider kiya but temperature chnge 51.5 or 52.5 kyn consider q kiya h ??
@khan_affan
@khan_affan 6 жыл бұрын
Yup you are correct bus counting me thori mistake hogai... 56.5 and 57.5 hoga... JzakAllahu Khairan for correction...
@heee302
@heee302 2 жыл бұрын
how can we find out the slope of tangent?
@Vivek-uu2gq
@Vivek-uu2gq 2 жыл бұрын
Use black pen on graph for better ....clear vision
@introvert911
@introvert911 2 жыл бұрын
Mujhe ya practical mila h or graph smjh ni aarhi thi thank you...or sir agr hamne reading jo pehle likhi ho practical class ma agr wahi same ajaye tw koi msla ni hoga?
@khan_affan
@khan_affan 2 жыл бұрын
aisa koi masla to nahi, but same aati nahi hain... variation ajata hai
@gulamna731
@gulamna731 2 жыл бұрын
Jo Physics ka First Practical hai jismein Heat Capacity Of Metal Bob Find Out karni hoti hai , usmein Theory ke andar kiya kiya likhenge ??? Plzz Mention It Here 🙏🏻🙏🏻🙏🏻
@mohammadyusuf9124
@mohammadyusuf9124 4 жыл бұрын
sir plzz sonometer first law graph, resonance tube graph plzzzz
@chetanainakar2483
@chetanainakar2483 5 жыл бұрын
But in my college,mirror is used to plot graph
@bogo_indian
@bogo_indian 5 жыл бұрын
MARVEL Entertain same here
@prathamraut6014
@prathamraut6014 5 жыл бұрын
Same here bro . 😅😎
@aliakhan2351
@aliakhan2351 5 жыл бұрын
Yes
@pravinmirashi1046
@pravinmirashi1046 5 жыл бұрын
Same here😪😪
@ksamirakhan
@ksamirakhan 3 жыл бұрын
Sir mery pass graph m cooling constant ki value 0.07 a rhi hai to kya ye thk hogi
@khan_affan
@khan_affan 3 жыл бұрын
thora dur hai... try again, then discuss
@yasirjan2597
@yasirjan2597 Жыл бұрын
ABC
@tejitchaudhari4923
@tejitchaudhari4923 5 жыл бұрын
Thank you sir for both videos . But I han an dought That , why graph is plot in forth quadrant ?
@SPARKcreative
@SPARKcreative 5 жыл бұрын
Tejit Chaudhari because temperature is decreasing
@khan_affan
@khan_affan 3 жыл бұрын
I second @SPARK
@cleopatra8734
@cleopatra8734 3 жыл бұрын
Okay is there a way to plot so that there is a linear relationship?
@khan_affan
@khan_affan 3 жыл бұрын
I guess log se ho shaid, I am not confirm, but I believe there must be...
@muhammadfahadqazi8529
@muhammadfahadqazi8529 3 жыл бұрын
Sir agar temp axis per 10 small box consider kreyingey tou phir plotting kese hoji
@khan_affan
@khan_affan 3 жыл бұрын
Same pattern hoga... Bus aap ke points height wise qareeb qareeb hojayeingy... Just try to locate correct temperature at given time... Like 1 min wali vertical line ko dekho or jo temperature ho uspe us horizontal line ko dekho, un dono lines k jahan mil rahi houn wo point mark kardo, similarly for all other values...
@khan_affan
@khan_affan 3 жыл бұрын
Hope its clear to you, you can ask if it is still confusing...
@SWAPTECH20
@SWAPTECH20 3 жыл бұрын
Sir plz new syllabus maise physics ke jo tin graph kaise nikale uski video banakar daale plz plz
@khan_affan
@khan_affan 3 жыл бұрын
Dear aap ka board konsa hai?
@m_arman_sheikh
@m_arman_sheikh 2 жыл бұрын
Sir ye straight nhi banega graf?
@ratilalvasave9071
@ratilalvasave9071 5 жыл бұрын
thank you so much
@rayyazakirhusainkhan7814
@rayyazakirhusainkhan7814 2 жыл бұрын
Sir second graph
@shardaeducare
@shardaeducare 3 жыл бұрын
KINDLY SHOW HOW TO PLOT d theta by dt
@khan_affan
@khan_affan 3 жыл бұрын
You can discuss it here... facebook.com/PhyWithKhan/
@mariumyousuf4645
@mariumyousuf4645 6 жыл бұрын
sir you were repeatedly saying, line ko dekhna point ko mat dekhna, which line you were mentioning?
@khan_affan
@khan_affan 6 жыл бұрын
Yup... The curve... Actually when you will be drawing that curve you have to draw a smooth free hand curve due to which you might have to leave some points... Qk if you try to connect those point then you will not be able to draw a smooth curve... Isi liye I said when you are finding cooling constant then you have to connect those projected lines to the curve and not to the points... I hope you got the answer but still if there is anything confusing you can ask again will give you more details in it...
@ramlakamran2024
@ramlakamran2024 Жыл бұрын
If cooling constant will be 0.02 then will it be oky?
@khan_affan
@khan_affan Жыл бұрын
Yess
@Foodchnel
@Foodchnel 5 жыл бұрын
Sir mera first answer 0.07 dusra 0.05 third 0.06 aur fourth 0.04 arha ha tu ye shi ha mtlb ke ans beech mein km zyada hoskta ha jese mera 0.05 ke baad 0.06 agya aur phir 0.04 please btaye??
@khan_affan
@khan_affan 5 жыл бұрын
Readings fluctuate kar rahi hain... Itna variation nahi aana chahiye
@Fatii388
@Fatii388 Жыл бұрын
Sir please dark pen use keya kejeye ❤
@khan_affan
@khan_affan Жыл бұрын
بہت معزرت ۔۔۔ Recommended full HD and maximum brightness 🙏🏽
@faizanhassan4829
@faizanhassan4829 5 жыл бұрын
24:52 this is a mistake this is 56.5°C not 51.5°C
@archanasalalkar5479
@archanasalalkar5479 4 жыл бұрын
You are right. I was also telling him
@khan_affan
@khan_affan 3 жыл бұрын
Yup thank you, for correction... I will look into it another time & will add your pointed correction in description... Thanks again
@shehbazkhan2269
@shehbazkhan2269 2 жыл бұрын
Sir ye point 5 smj nhi araha kese aayega
@rohit36910
@rohit36910 5 жыл бұрын
111010011101100100101010100101010100101010101001010100101010101001010101001010101010010100100101010100010101010101000000000000000.00000000000000848848181818818484848848191918181818918189191818181818819181818181881818188181818919191919199191919199191919619191919919191919919191991919191991919199191818828264664616313699626999336936963699366933636639666990000000001010101010101010100110001010101010101010101010010101010110100101010010101010010101010010101001010101001001001010101010010100101001010101001010100101010101001010101001010100101001010100101001010100101010101010010101001010101010100101010101010👽
@memuslimahabdulqadir7762
@memuslimahabdulqadir7762 6 жыл бұрын
value agr 0.04 ya 0.06 aye to answer sahi he?
@khan_affan
@khan_affan 6 жыл бұрын
MeMuslimah Abdul Qadir Yes, acceptable...
@073.laibakhan7
@073.laibakhan7 5 жыл бұрын
Sir mere 5th minute ka 0.03 , 10th minute ka 0.04 aur 15th minute ka 0.02 araha hai.. But mere teacher keh rahay thay k teeno values same ani chahiye.. Sir please explain.
@khan_affan
@khan_affan 5 жыл бұрын
Yup you are right... That variation is due to experimental error... More or less it comes out to be near 0.04, 0.03 with experimental error that is why we are taking average in the end... If there is still any confusion, discuss...
@073.laibakhan7
@073.laibakhan7 5 жыл бұрын
@@khan_affan Sir teeno ka average 0.03 araha hai..theek h? Matlab mere teeno k answers tu theek hain naw?
@khan_affan
@khan_affan 5 жыл бұрын
Itna error is acceptable... Apni values batao jo aap ne college me kiya hai? Teacher ne verify kiya hai usay?
@073.laibakhan7
@073.laibakhan7 5 жыл бұрын
@@khan_affan Sab se pehle walay comment m sari values likhien hain Sir.
@073.laibakhan7
@073.laibakhan7 5 жыл бұрын
5th minute ki 0.04 10th minute ki 0.03 15th minute ki 0.02 20th minute ki 0.02 Aur agar in sab ka average nikalun tu 0.02 araaha h.
@haniashah6758
@haniashah6758 Жыл бұрын
Anyone for 2023 practicals?
@khan_affan
@khan_affan Жыл бұрын
I am, not appearing but conducting lol 😁...
@zimalshah35
@zimalshah35 5 жыл бұрын
Lekn mere pass time 25 tk jara hai toh iska graph kese bane ga plz bta den
@khan_affan
@khan_affan 5 жыл бұрын
No problem... Dekho is graph me ek box or hai extra wahan pe usi scale k according 25 min bhi ajayega... Try karo... Then let me know if you find it difficult...
@zimalshah35
@zimalshah35 5 жыл бұрын
Khan Muhammad Affan okay sir
@zimalshah35
@zimalshah35 5 жыл бұрын
Me apko kaise dekhaun k mera graph sahi nhi banra plz btaen
@khan_affan
@khan_affan 5 жыл бұрын
Send it on FB... Khan Muhammad Affan...
@zimalshah35
@zimalshah35 5 жыл бұрын
People or page or kiya likh k search karun
@arshankhan8190
@arshankhan8190 5 жыл бұрын
Graph. Paper. Required. h
@shehbazkhan2269
@shehbazkhan2269 2 жыл бұрын
Sir hamare 4 box me 20 nhi araha 3 me araha h
@khan_affan
@khan_affan 2 жыл бұрын
Bilkul ye difference aa sakta hai, aap apni readings k according scale set karein...
@shehbazkhan2269
@shehbazkhan2269 2 жыл бұрын
@@khan_affan ok sir
@mitinamtali3134
@mitinamtali3134 Жыл бұрын
Not visible write and draw it with pen and marker 😓
@pravingiri5828
@pravingiri5828 2 жыл бұрын
Anyone for 2023
@bottomfraggergg
@bottomfraggergg 4 жыл бұрын
Try writing with pen or marker...literally cannot see properly
@khan_affan
@khan_affan 4 жыл бұрын
Extremely sorry for inconvenience...
@yasirjan2597
@yasirjan2597 Жыл бұрын
Featureless
@zoyaahmed9869
@zoyaahmed9869 5 жыл бұрын
Curve mujh se theek nhi bnra
@Deepmala_kadam
@Deepmala_kadam 5 жыл бұрын
But sir aapki writing dikhai nahi rahi so sorry
@SanaKhan-gq2nb
@SanaKhan-gq2nb 5 жыл бұрын
Sir aap nay 5 or 10 minute k bd ho temperature nkala ha wo smjh nh aa rha..
@khan_affan
@khan_affan 5 жыл бұрын
Matlab usmay kiya samajh nahi araha? Kindly explain... Taakay me clear karoun
@SanaKhan-gq2nb
@SanaKhan-gq2nb 5 жыл бұрын
@@khan_affan sir wo jo ap count kr rhay ha 2 lines bd itna temp ha wo... point lgana smjh nh aa rha... andazay say lay sktay ha kiaa point...
@khan_affan
@khan_affan 5 жыл бұрын
Okay now read carefully... Y-axis pe hum ne temperature liya hai... Upper scale agar dekho to usmay likha hai 10 S.B = 5°C... Iska matlab ye hua k agar main 10 small boxes agay barhoun ga to 5° temperature barhay ga Yani k 10 steps pe 5°, to 1° barhanay k liye kitnay steps chahiye hongay? Yes 2 steps? 2 step = 1° Agar main ek step agay barhoun to kiya hoga? Jee 0.5° barhay ga (yani half) Qk 2 step chala to 1° barha to 1 step chaloun ga to aadha ° barhay ga na? Ab clear hogi kuch picture... Agar main 50° pe houn or ek step small box agay jaon to 50.5°, phir ek or step 51°, phir ek or step 51.5°, phir 52 Phir 52.5° Phir 53° Phir 53.5° Is tarhan y-axis ka scale chal rha hai... Ab final baat now suppose me 50° pe khara houn mujheu 54.5° pe jana hai... To batao kitnay boxes agay barhoun ga? I hope clear hoga lekin still koi confusion ho to puch lo
@SanaKhan-gq2nb
@SanaKhan-gq2nb 5 жыл бұрын
@@khan_affan ub 50 say 54.5 tk anay k lye 9 boxes agay brhna hoga.. right...
@khan_affan
@khan_affan 5 жыл бұрын
Behtreen...
@kavitaindulkar2141
@kavitaindulkar2141 4 жыл бұрын
Pls try to make ur videos shorter no one wants to invest so much of their time in one exp otherwise everything is nice
@khan_affan
@khan_affan 4 жыл бұрын
Thank you for your feedback... We will try to shorten these videos in next cycle... :)
@sahiltrimukhe8765
@sahiltrimukhe8765 5 жыл бұрын
This Video is not clear very dark place not bright light
@Aakarsh350
@Aakarsh350 4 жыл бұрын
25.01 !!!! 51 degrees is wrong
@khan_affan
@khan_affan 3 жыл бұрын
Thank you for correction...
@jayashreebera1152
@jayashreebera1152 5 жыл бұрын
Clear q nahi aara
@khan_affan
@khan_affan 5 жыл бұрын
Sorry for inconvenience... Didn't realize this while recording... Try to increase the brightness of device, this might help... And we will consider this factor in further recordings...
@Aakarsh350
@Aakarsh350 4 жыл бұрын
ek accha sa graph paper khareed leta yaar !!!! Its too light
@khan_affan
@khan_affan 4 жыл бұрын
Extremely sorry for inconvenience...
@Aakarsh350
@Aakarsh350 4 жыл бұрын
@@khan_affan Bohot jaldi reply diya aapne 😂😂😂 February mei hua mera pracs and abhi I am enjoying my vacations 😂😂#StayHome!! Anyways thank you !!! By the way mujhe newtons law he aaya tha pracs mei
@khan_affan
@khan_affan 4 жыл бұрын
Sorry once again... Well Stay Blessed and Stay Safe... Thank You...
@Aakarsh350
@Aakarsh350 4 жыл бұрын
@@khan_affan 😃
@rameshchandrasinghyadav977
@rameshchandrasinghyadav977 4 жыл бұрын
For 10th minutes calculation is wrong
@sanskritaekawade3983
@sanskritaekawade3983 4 жыл бұрын
bakwas vedio
@adnanzia7932
@adnanzia7932 2 жыл бұрын
Thanks sir
@ratilalvasave9071
@ratilalvasave9071 5 жыл бұрын
thank you so much
@laibakamran9269
@laibakamran9269 5 жыл бұрын
Sir ....linear expansion vala nhi h?
@khan_affan
@khan_affan 5 жыл бұрын
Physxone ne bhi videos upload ki hain you can also visit there
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