Heat Class 7 & Combustion and Flame Class 8 | Class 8 Science Sprint
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- čas přidán 6. 09. 2024
- In today's Science Sprint session, we discuss Heat class 7 and Combustion and Flame class 8. The aspirants are advised to watch the entire video lecture for a better understanding of these chemical effects of electric current and electric current and its effects chapters. This session will mainly be around the most important topic of Combustion and Flame class 8 science and Heat class 7 science. Heat Class 7 | Combustion and Flame Class 8 | Science Sprint | Vedantu -
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I have asked a question of science combustion and flame activity column answer
Tatti
300 unliker
Mam then ignition temperature means jo bahot heat mei jalta hai
Am I right
If i m wrong then tell me
Tatti
26:48 class 8 ch 6 combustion and flame explanation starts
very nice explanation ma'am
thanks a lot
Tysm!
Thanks mait
@@abidmuzammil5016 tyyy
thanks very much
Helped me a lot😂🤘🏻
Class 8 students click here 👇👇
26:51
To read combustion and heat.
Thanks me later
Thanks Bhai...thanks a lot
Bhai if you don't mind I have question why are you looking so serious in your dp
THANK YOU BRO
Thanks bhai
Ok
For class 8 Combustion & Flame Starts in 26:50
Thanks bro 😊😊
Bhai tu toh Vedantu ka pura fan hai yaar
Har video m humara time bachata hai thank you so much
26:51 is Combustion and flames class 8
Looking for this comment 🧐
Thank you 😭
Thanks so much
Thx bro
THANKS :)...
Mam really understood everything...
Thanks🥰
26:48
Class 8 Chapter-6 combustion and flame explanation starts
very nice explanation ma'am
thanks a lot.............
u copied from srishti chauhan
@@prakharraj155 :)
Mam I am from tamil nadu and I cant't understand hindi so pls avoid speeking in hindi often cuz at times any important stuff comes u change it to hindi and I get confused so pls mam a kind request mam thank you so much mam
Thank you so much ma'am
Great explanation 👌👍
And very helpful !!
It will be much better if all the explanation are taught in English, because I'm poor in Hindi language. I hope you will look into this matter.
Thank you
26:48 class 8 combustion chapter starts
thank ful to you to help others 😂😂😂😂😂😂
Thank you Mam.this was an excellent explaination 💜
First time seeing an army here💜💜💜
Yesss 😂
💜💜💜💜
Yes 💜💜💜 purple you 💜
Hey !!! Who is your favourite?
mam the way of your taking is amazing
32:35 the ones who dont know whats inversely proportional is when one value increases one decreases we have it this year in maths:)
When u have a lot of ego. Then knowledge will be less. When u have lot of knowledge ego will be less this is what inversely proportion
26:51 is for class 8
I saved your time 😀😊😊😊
Thank me later 😂,
🤦
Thanks
Thanks Man You saved my time 😁😁😘😘
You are not the only who tell us that class 8th chapter starts on 26 : 51
Ma'am in convection process
(Sea breeze) does the warm air captures the cold air place? 22:10
@Nabamita Bhattacharjee mam when u are getting next live class on CZcams for class 8th class
mam how to find ignition temp. of a substance ??
Sweet boy 🍬🍫🍪🍦🍨🍧🥧🍬🍨🥧🥟🍱🍚🍧🥟🍕
Yes mam
Mam please make separate videos...i am in 8th and i just wanted the 8th class chapter but i had to see the whole video that i had learnt in class 7th...so mam its a humble request to make separate videos
Me too
Can't you take it forward !?🧐
Take it directly on 26th minute
you can forward it by double tap but don't scold
thank you for giving answers for my doubts
The Ignition temperature of petrol is 280 Degree Celsius
No
40:29 we can pause and take screenshot
Mam the way of your talking is amazing
Petrol ignition temperature is 280 Celsius
In rapid combustion you can even add that it happens with the help of a fuel that means you need to burn the fuel whereas in the spontaneous combustion you need not need a substance to burn it ,it will burn as soon as it is in the room temperature
30:00 mam but the pen is made up of plastic and plastic is non-combustible material so how you can say that pen can burn rather it can melt at ignition temprature
No it just a example
Mam this video is helpful for me mam but you are speaking in hindi so i cannot understand your words
S mam say in Kannada or English
Wowwww ma,am u can understand very nicely....thank you so much ❤️😍😘 ma,am
22:03 style of saying ok 😅😅😅😂😂😂🤣
Okay?🤓🤓😂😂😂😅😅😅
🤣🤣🤣
🤣🤣
29:20 mam how is fire formed when we strike two stones together. There is no fuel in there..... pls confirm !! :-)
There is a spark and fuel is the dry grass
Rubbing those two stones produces spark and when it is near the dry grass as there is less moisture it catches fire
Because of friction...
41:00 I literally laughed on your expression while raste pe aa jayenge
Thank you mam it helps me to get good marks in exams
Mam u should also speak in hindi for some of students it will be helpful for us and others to catch the term easily
Nakli ajj bhi
😷😷😷
U examplaided ignition temp very deep n nice
Hi
Fuel Flashpoint Autoignition
temperature
Ethanol (70%) 16.6 °C (61.9 °F)[5] 363 °C (685 °F)[5]
Coleman fuel (White Gas) −4 °C (25 °F)[6] 215 °C (419 °F)[6]
Gasoline (petrol) 52 °C (126 °F)[7] 210 °C (410 °F)[8]
Jet fuel (A/A-1) >38 °C (100 °F) 210 °C (410 °F)
Kerosene >38-72 °C (100-162 °F) 220 °C (428 °F)
Vegetable oil (canola) 327 °C (621 °F) 424 °C (795 °F)[9]
Biodiesel >130 °C (266 °F)
26:58
Combustion and flame starts
Thanx bro
Thanks
Ma'am aap you tube main he samja dete h toh vedantu ko join krne ka kya matlab 🤔🤣😂😂🤣😂🤣😂🤣😂🤣😂🤔🤔😂😂☺️☺️
Kyu sahe kha na 😂
Haha😂😆
You are right 😂😂
Namibia man you are my favourite
Thanks miss for teaching us so nicely that l can understand quickly ,,😃😃
Realy
Mam your teaching way and the way you make us understand is amazing thank yu for helping us
Thanks so much for your help
Mam please can you make classes on reasoning also please mam
Hello ma'am if you don't know the correct ignition temperature of the substances so why do you tell us with the wrong method mam please check before making it we want to learn all the concepts from vedantu only and you are only telling us wrong. How would it make our marks go better ma'am in this only video I am telling you please make sure that all the slides all the methods you're telling are correct and must be correct you are the master teacher here at vedantu please keep it in mind. And I hope everybody is agree with my point. I am not saying that you are a the teacher you are one of the teacher which sits in our mind and we get remember all the things from you this is just for telling you that I don't want to make your feelings go at the wrong side. Pls make sure of every thing 🙏🏻
26:51 the chapter combustion and flame starts for class 8
Thanks
Thnks
Thnks
Thanks
can we use wood or petrol as a fuel for flame
yes
Yes
yes we can
No we cant...we can only use mobile phones and ipads to burn fire
@@pxrth1v What A joke :)
Mam please make 8 chapter- structure and functions
Yes mam please
Yes ma'am please 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
@@anushkasahni07 paisa....ye paisa....paisa ke liye .....dude
Ma'am you teach very nicely , I love your teaching and I understand everything 🤗🥰👋💫
29:33 yes mam aag ko bhi kuchh khaney ke liye chahiye 😂😂😂
nobita mam the best mam ever in vedantu,my whole syllabus is complete because of nobita mam
apne acid rain and calorific value vala topic nhi krvaya for class 8 it is also in this ch
mam you forgot about CALFORIC VALUES
mam all part is not covered here, fraction distillation is remaining and destructive distillation is also remaining
NOTE:- PLS TRY TO COVER THE ABOVE TERMS
Mam you are my favorite 😚 and your explanation was sooo good thank you so much mam
Amazing mam can you explain reaching tha age of adolescence. Plz plz plz
Taken into consideration. Will do it.
@@VedantuJunior mam sir ne padhaya h vochapter ap padhaiye plz
One of the best teacher👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫👩🏫
ma'am what is calorific value of flame? If anybody knows please replay.....
Hi
Calorific value of a fuel is the heat liberated when one gram of fuel burns completely in oxygen
SI unit is joule per kilograms
Okay👍
@@ArtiSingh-os9yi okay, thank you a lot.
Your teaching style is superb
41:02 LOG SADAK PE AA GAYE XDXDXD
Thankyou for explain mam
Thanks mam it helps me a lot in this pandemic...😊😊👍👍
41:00 Dear ma'am, now-a-days we do. :
Unbelievable way of teaching
Correct vedantu and nabamita mam is very great
Mam your teaching is very nice 😊!!
I love your teaching 🤗😁
Mam I installed the vendatu but I do not show any videos of class 8 please tell what I do to show the videos class 8
Subscribe and see there.
Thanks..Understood the chapter nicely...but didnt find the topic of fuel efficiency and burning of fuel leads to harmful products...but loved the class...
Ma'am what is different btw the incomplete or complete combustion you didn't explain this
in complete combustion - the fuel or substances which burns completely in incomplete combustion - the fuel or substance which burns incompletely if u find any mistake then sorry as I m a student also .... [in English also]
in complete combustion the flame is in blue colour and incomplete combustion the flame is yellow any mistake so sorry
Complete Combution - occurs when there is plenty of supporter of combution or O2, it burns Completely producing CO2, heat and light and leaving on residue behind.
Incomplete Combution - occurs when there isn't sufficient O2, it gives out smoke,soot etc and CO.
Thanks mam.... I have deeply understood this chapter
thNKU beta but its understood
@@everyxtims Btw it's thanks not thnku
Explosion has more intensity also
Ma'am, I want to ask that do we use fuel while lighting up a matchstick... Because according to me we just need heat and 02
Doesn’t matchsticks have a type of chemical present in the red part
Ma'am I just liked ur all sessions 🙈 You teach really awesome 😊😊🍒
Plz make a Quiz on all chapters of class 7 science 🎀😊
26:48 class 8 ch 6 combustion and flame explanation starts at
*Thank you so much mam for lockdown time*
Yess
Great explanation mam!!
Hello Ma'am here Riddhi talking with you
Where is pdf
Amazing
Your concepts are clear ( love 😍 you)
mam why you see always left side of the camera
Yessssssss
Because mam is teaching the other live class
To see if anyone has any doubt because on the left side there is the chat as it was live at that time
U all are wrong she sees herself to make sure that the board is visible
but there is no oxygen near stars then how they are burning?
Mam we are not the students of America .......... You have to taugh Americans ...... Dronstudy are good for us ...... 🔥🔥
Right!
Vedantu young wonder is best for teaching
20:44 cloder water hahahahahahahahaha
Please give me the link from where I can get notes
Mam how sun burn without oxygen
Mam you are very good teacher thanks for teaching mam ✍✍✍✍✍
Mam please teach friction 😗. It is so hard chapter. I can't understood it😥. You teach force and pressure but you can't teach friction.please mam in this holiday of corona virus I understand all chapters which you teach but you not teach friction .there will be many grammatical mistakes because my English is so bad so ignore these mistakes😅😅😋
No I can also teach you if you come to my home at pithoragarh at Uttarakhand . I have understand the chapter easily bhai
@@ghanaxipandey7993 agar ap tuition pada sakte ho to ap ye video kyu dekh rahe ho
@@pearlpandey right
Mam can you please make video on conservation plants and animals
Thanks maaaaaam ❤️❤️❤️❤️
Hii mam I am ritik yelne
Mam you are best teachers for vedantu thanks mam
Thank you mam and your smile is so cute
Teacher pe bi🤦
@@lipishree3634 😂😂😁aisa mat bolo
ma'am l want to ask that do use fuel while lighting up a matchstick... Because according to me just need heat and o2
Mam what does inflammable substances mean ??
Inflaming substances mean which can not produce flame after burn because they burnt completely and no particle vapourise after burnt.
@@VShiksha21 ap ka bhi koi learning change hai kya
you are the great teacher
Thank u mam u make our study easy
All the best
@@VedantuJunior thanks mam 🤗🤗
Mam you teach very well but you speak very slow....I had to speed up the video to not get bored...
But mam when we mix , hot water into cold water then hot water turn to normal temperature why this happens?
Because the Temperature from the hot object gets transferred to the cold object
mam my house got burned when sofa caught fire and your saying no need to call firemens lol
Mam really understand everything
So at what is there ignition temperature of MATCHSTICK.....asking because through matchstich we Burn other things so....😅😅😅
26:48 class 8th Start 👍🏻
33:40 but water also has oxygen in it.....will it not help the fire...pls answer me mam
even i asked the same question to my teacher . she told that the oxygen form in water is uncumbustable, oxygen should only be in gas form. the constituent elements of a compound differ from the element itself.
here water - H2+O=H20
H- EXPLOSIVE GAS
O- CUMBUSTION
BUT water extinguishes fire.
SOOO... you get it.
not the best explaination, becuase even i am in 6th
short answer- no
long answer- when hydrogen gets mixed with oxygen the result is oxygen
hydrogen is flamable but oxygen is not
yes oxygen is a fuel and supports combustion ozugen cant be burnt
if you are confused :
a candle will burn only if there is oxygen but the candle wont burn the whole oxygen constitute in the air that will put the whole world on fire.
so where were we? yes, hydrogen combines with oxygen the result is water, when the atoms of hydrogen and oxygen get linked they make a molecule with completely diffrent properties You can't burn pure water, which is why we use it to put out fires instead of starting them
but you can burn hydrogen
@Utkrisht Gandhi sorry it was an error but before replying read further bruh