Class 8th Science Chapter 15 | Some Natural Phenomena Full Chapter Explanation (Part 1)

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[@shivpaliwal7901]

Iiik

[@based7953]

20:01 Ans- We see the lightning before the sound of thunder. Reason- the speed of light is much more than the speed of sound. So, the light of lightning reaches our eyes much before than the sound of thunder reaches our ears.

[@MagnetBrainsEducation]

Thank you for your comment! We are glad that you are taking the time to watch our educational videos and are learning something new. We hope that you continue to find our videos interesting and useful in your studies!

[@ayshakhan7726]

And also because sound need a propogate to travel and light doesn't

[@ashwinchobber8957]

How do we know what type of charge is present on a charged object? Nagative or positive

[@greninjagaming1844]

we cant but we know that the silk is negative and glass rod is postive when rubbed together

[@AshwinKumar-hh4hg]

The sismograph help to show the position and negative charge

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[@ChewedOutSandwich]

2:33:58 Ma'am, when we rub any object with polythene, doesn't the polythene gain negative charges and the object which is rubbed gains Positive Charge.

[@ChewedOutSandwich]

So mam won't the plastic straw gain positive charge.

[@MagnetBrainsEducation]

Thank you for your question! When you rub an object with polythene, the polythene transfers some of its electrons to the object. This gives the polythene a net positive charge and the object a net negative charge.

[@ChewedOutSandwich]

@@MagnetBrainsEducation thank you very much for the help 🙏

[@ashadudani792]

So,mam if there are more no.of protons in an atom so it will make a positive charged object ? " Or" If there are more no.of electrons in an atom then will it make an object negatively charged? If yes then mam how come atoms have same no. of protons and electrons as atoms are neutral.

[@azamkhankhan7524]

Mam how can we identify that any object has positive charge or negative charge?

[@MagnetBrainsEducation]

Thanks for your question! To identify an object's charge, you can use a device called an electroscope. This device works by separating two metal plates and then charging the object and bringing it close to the plates. If the object has a positive charge, the plates will move away from each other. If the object has a negative charge, the plates will move towards each other. I hope this helps!

[@ghsbhatwan9535]

Thank You so much mam☺️

[@MagnetBrainsEducation]

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[@ashwinchobber8957]

2:40:16 ma'am you are saying that the charge will transfer to the aluminium leaves and it will repel, but earlier you said that charged objects attract uncharged objects and aluminium leaves are uncharged. So, how will it repel? Acccording to me it shouls attract

[@ashwinchobber8957]

2:08:25 ma'am you are saying that protones will accumulate at one place but protones are stationery and they cant move. So how will they move?

[@ashwinchobber8957]

Please reply

[@Jiuuuuuu-sss]

Ma'am can you please tell me a suitable answer of what is electric charge to write in an exam

[@STAR_GURLS]

15:46 maam examples of disadvantages because of storms

[@nahidalonenahidalone1142]

Thanx ma'am lots of happy from kashmir..

[@makingpopattoyoutubers8903]

Yes you are right

[@adwaitagrawal]

We see the lightning before the sound of thunder because the speed of light more than the speed of sound.

[@parvez1366]

2:38:00 skipped one session "Electroscope"

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Mam you’re teaching very deeply and giving more content and 🙏🏻 thanks for teaching the full content

[@KavitaRawat613]

Nice mam..😊🤗

[@anujyaduvansi]

Nice teaching mam 🙏🙏🙏

[@ashwinchobber8957]

Ma'am you teach very good and I appreciate that but it is my request that you should make small videos as it makes us very difficult to watch the whole video of 8-10 hours. Please take my request seriously and solve my problem.

[@5aananyabiswas276]

Yes,you are correct 😅I am also facing the same difficulty

[@RED-qm3ib]

I am studying this before my pa 3 and this video helps me a lot. Thank you magnet brains

[@Chapri_Vedanth]

same

[@Svnbangtan3805]

Thank you so much ma’am :)

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Your response: Thank you for your positive feedback! We're glad you're enjoying our educational videos and hope they're helping you learn and succeed in school. Keep up the good work!

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Welcome

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You are the perfect teacher ma'am 😇😍😊👌💯💯

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[@meenayadav1321]

Mam practical bhi samjhaya kariye❤❤❤❤❤❤❤❤❤

[@meenayadav1321]

Yes mam

[@garimagangwal6767]

very helpful...... thank you so much mam

[@jaishnavikundaram3228]

20:01 the answer is :- light comes first then we hear sound

[@kamrannazir2027]

Ty mam...for clearing our concepts...❣️✌️ Lots of love frm kashmir...💗🌺

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I am kashmir too

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[@prahladswroopmeena8091]

She was look like a God. Before exams

[@sumayyanusrat6413]

Thank you magnet brain for such a good explanation, ,👍👍👍👍🤞🤞

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4 20:39

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Mam your teaching is so good

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Ma'am your teaching is sooooo good 👍👍😊😍😍

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[@shortsinsaan8823]

50:10 funny moments 😂😂

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[@pjkkl925]

Very nice

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[@r.nbrother7610]

Good morning mam

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[@amanroy9289]

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[@Universalgamer-yj5ok]

Speed of light is more than speed of sound

[@MagnetBrainsEducation]

Hi there! Thanks for watching our video and for commenting! It's great to see you taking the time to learn about the speed of light and sound! We're glad that you found our video helpful and we hope you continue to find our other educational videos just as useful. Keep up the great work!

[@chotupandey7235]

Very helpful video mam thanks

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[@brijmohansharma2232]

Thanks mem you teach very very very very nice

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[@makingpopattoyoutubers8903]

Mam jo aapne 2:17:23 me btaya tha to dusre balloon ko bhi same silk ke kapre se rubbed kiya jata to wo balloon me positive charge aa aayega kyoki wo jo silka ka jo capra tha wo pahle se hi positive charge h

[@fayazkumar8133]

Firstly lighting and last sound because light is faster than sound

[@DUSTY-SG]

20:23 speed of light is faster than speed of sound😅

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Thanks magnet brains.

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We're so glad to hear that you're enjoying our educational videos! Keep watching and learning - we hope you'll find them helpful. Thank you for your support!

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Mam aap bahut acha explain karte thank you so much ma'am ❤😊

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Welcome!

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Har Har Shambhu

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Har har shambu

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It is value of time to watch this.....

[@Abrarphysics5385]

Mam because speed of light is faster than speed of sound

[@MagnetBrainsEducation]

That's an excellent observation! It's true that light travels faster than sound, and this has a lot of implications on the way we experience the world. Thanks for your comment!

[@Mathswala12354]

Ma'am you have explained this chapter so well Thank you ma'am

[@jasvirrattan8283]

Mam your way of explanation is very good and thanks for this video

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[@mitikasingh549]

1:47:15

[@ritika5892]

Ma'am phle lighting dikhai dete hai because light ki speed sound se jyada hota hai

[@shahzadawaheed5913]

Yeah

[@PriyaSingh-wh5tw]

Yes

[@shravan067]

No pehle light isliye dikhti ha kyuki apni aakh aage hai aur kaan piche😎

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@@shravan067 🤣🤣🤣🤣

[@sarkargaminglol5495]

Ha babu

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Thank uh so much mam....❤️

[@tashiyangzom2851]

Gargan of badal

[@fahadff8963]

Thanks 😊 ma ,am

[@mamtakumawat7831]

We see lighting as speed of light is faster than speed of sound

[@MagnetBrainsEducation]

Thanks for your comment! We're glad you find our educational videos helpful and informative. We hope to continue providing you with quality content to help you with your studies. Keep up the great work!

[@Silenceismusic]

Because the charges are strong and they were transfer into the ground (Negative to positive)

[@shashwatprakash6289]

light travel faster than sound so lightning will occur first and then sound will come .

[@MagnetBrainsEducation]

Yes, you are absolutely right! Light travels faster than sound. So, when there is lightning, we will see the light first and then we will hear the sound.

[@studyview4344]

mam my answer of your question is, the speed of light is much more than the speed of sound😃

[@MagnetBrainsEducation]

Great answer! You are absolutely right that the speed of light is much faster than the speed of sound. Well done for understanding this concept. Keep up the good work!

[@menikapriya]

Thankyou thanks a lot mam

[@creativecorner5645]

Mam agar Kam amount mei electric charges honge tab bhi air se conduction hoga

[@adityarohira1432]

Ji haa

[@No1rated_salesman1997]

no, as it require VERY high amount of heat to break air and allow electricity to pass trough. Lightning is 5 times hotter than surface of sun

[@SurprisedPoppyFlowers-sb5ou]

Mam please chapter3 coal and petroleum video

[@Jiuuuuuu-sss]

Ma'am can you please tell how we can write the answer of what is lightning for our exam or homework

[@Silenceismusic]

Transfer of negative charges to the ground is called lighting

[@mamtamoti9587]

Mam why charges not devloped with wet hair

[@ombhardwaj1157]

Your 10 hour videos are very important to gain knowledge.I scored 39/40 in science half yearly exam because of magnet brains and now I am preparing for final

[@MagnetBrainsEducation]

Wow! That's amazing! We are so glad that our videos helped you gain knowledge and score 39/40 in your science half yearly exams. We hope you continue to use our videos to help you prepare for your finals. All the best!

[@sandeepthakur6061]

Thanks mam😌

[@sakshitheartlover9503]

Mam is human being is also made of atoms

[@MagnetBrainsEducation]

Thank you for your comment! You are absolutely right, we are all made of atoms. But it's amazing how such small particles can come together to create something as complex and beautiful as a human being.

[@girjasingh4843]

👍👍👍👍

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[@UjwalaCharjan]

I have a doubt, Does an object have particularly negative or positive charge over it or it depends on it's material ,when rubbed.

[@MagnetBrainsEducation]

Thank you for your question! Objects can have either a negative or positive charge, depending on the material it is made of. When you rub an object, you are moving electrons from one atom to another, which creates a charge.

[@shivpaliwal7901]

Mam will the charge stay forever or will it be gone after sometime

[@shivpaliwal7901]

Pls tell🙏🏻👏🏻

[@RekhaSingh-fg5bx]

It'll not last forever​@@shivpaliwal7901

[@educational_series276]

mam first the lighting will appear because the speed of light is more than the speed of sound

[@trivenisoni619]

Mam light travels fast than sound

[@MagnetBrainsEducation]

Thank you for your comment! We are so glad that you have been learning something from our videos. We strive to provide quality educational content to all our viewers, and it is great to hear that you have been enjoying it. Keep watching our videos for more interesting facts about light and sound.

[@Skshorts-kv3zj]

2:55

[@shivshankaragarwal5155]

We see the lighting before the sound of thunder... Because the speed of sound is less than speed of light ..... . . The speed of light is 3×(10)8 m/sec. The speed of sound is 304 m /sec.

[@PriyanshuKumar-bf4ny]

We see lighting ⚡first because the speed of light is fast than speed of sound . So,we see lighting first and we hear thunder ⛈️after

[@MagnetBrainsEducation]

That is absolutely correct! It is amazing how quickly light travels compared to sound. We hope you continue to learn more about the incredible world of science!

[@Ujjwalsingh564]

Pata h jada mat bolo

[@Mathswala12354]

Ma'am first we hear the lightning before thundering because 💡 light travels faster as compare to sound. This is reason behind it that we hear first lightning before thundering

[@Sheikh_uzair_00]

Mam app bhopal sa ho.?

[@Sheikh_uzair_00]

😘😘

[@king..of..universe5123]

Thanks mam for this lecture 😎

[@pachnoyt7552]

What is the speed of light

[@MagnetBrainsEducation]

Thanks for your interest in our educational videos! The speed of light is approximately 299,792,458 meters per second in a vacuum. We hope this answer was helpful and that you continue to enjoy our educational videos!

[@DEVILDEVIL-bq4lg]

i have a question Do all insulators carry same type of charges?

[@MagnetBrainsEducation]

Hi there! Great question! The answer is no - some insulators carry electrical charges, while others carry magnetic charges. We hope this helps!

[@knowscience5412]

Ma'am first we see lighting and after we hear a sound of light

[@MagnetBrainsEducation]

Thank you for your comment! We are glad to hear that you are paying close attention to our educational videos. We hope that our videos are helping you to learn about light and sound in an engaging way. Keep watching!

[@SureshSharma-mo5bv]

ma'am you teaches very well

[@MagnetBrainsEducation]

Thank you so much for your kind words! We are delighted that you are finding our videos helpful in your studies. We strive to provide quality educational resources so students can excel in their studies. We hope our videos will continue to be of help to you!

[@SureshSharma-mo5bv]

it's my pleasure ma'am

[@ratangupta3951]

Maam if both are made up of acrylic plastic, rubbed together then both objects have accumulation of positive charges.😂😂😢😅

[@adityasolar8259]

Don't see East or West go and do best with MAGNET BRAINS.

[@mrdeadfootballshorts4089]

Mam of course light there's no comparison between lightning and sound

[@SanjanaNaik-h9w]

Light travels faster than sound

[@MahendraKumar-ur1wo]

In the case of rubbing . The charges acquire by the object on rubbing(or by friction) depends on ?

[@MagnetBrainsEducation]

Thanks for watching our video and for your comment! We are glad you are engaging with our content. The amount of charge acquired by an object due to rubbing depends on the materials used for rubbing and the amount of force applied. We hope this answer was helpful!

[@sakshix511]

I Watch this video 1 day befour exam of speed of 2x

[@rajanikant3174]

Mam lesson 18 jaldi video laiye

[@shlokgoingforiit]

Video starts at 27:40

[@MagnetBrainsEducation]

Thanks for pointing that out! The video has been updated and now starts at the correct time.

[@niharikasinha8512]

Mam apne bataya ki jab silk cloth Ko plastic rod se rub karte hai aur Apne yah bhi bataya ki wo dono uncharged object hai to un dono ko rub karne par silk cloth me bhi charge obtain hoga kya

[@sunildehanwal8028]

Mam your video is so good

[@AshutoshSingh-k8e]

Mam sabse pahle lightening dikhti hai kyunki light ki speed sound se kafi jyada hoti hai aur sound ki speed slide se kafi din mein hoti hai

[@arunchaturvedi1032]

Goodnight

[@JAI-mc9px]

Good night

[@funtime11753]

light is faster than sound 👋☺️

[@zoyakhan2083]

Maam can you explain what is phenomenon 🙂please maam

[@MagnetBrainsEducation]

Hi there! Thanks for watching our educational videos. I'm glad that you're interested in knowing more about phenomena. A phenomenon is a fact or situation that is observed to exist or happen, especially one whose cause or explanation is in question. I'm sure our video will help you understand the concept better. Thanks for engaging with our educational videos.

[@TARAKNAG-v9v]

Natural Phenomena means prakritic ghatna in hindi in short

[@yogendrasingh7207]

I am sorry mam i wrote what i thought and i think that you will improve

[@pujathakur3134]

Mam kya koi aisa instrument nahi hai jisse hum lighting ka speed measure kar sake

[@vandanasharma9579]

Mam i have a doubt A plastic comb when rubbed with dry hair get charged however a metallic comb does not charge why 😅

[@ahanabarua3083]

this happens cause metals are conductors of electricity, so the charge flows down to the earth

[@rimpybhagotra9041]

I have a doubt...if we charge a balloon with silk cloth, what charges both will acquire

[@Khushii_021]

Mam ye to batado charge ka matlab kya hai

[@azraanjum1109]

Magnet 🧲 🧠 brains is very interesting 🤔

[@MagnetBrainsEducation]

Thanks for watching our video! We're glad that you found it interesting. We hope that you find the rest of our videos just as engaging. Please let us know if there's anything else that we can do to make your experience even better.

[@anikbarman2415]

Light came faster than sound