1. Petrol does not dissolve in water. It just floats above it. It does not mix either. Hence, extinguishing petrol fire with water will not change anything, the fire will continue to burn, releasing harmful toxins. 2. For extinguishing fire, we use tap water. Tap water contains a lot of soluble salts and impurities. This increases the flow of ions, so tap water is a good conductor of electricity. Using water to extinguish electrically caused fires, will increase the burning, instead of extinguishing it. Thank you!
Petroleum doesn't dissolve with water thus when the petroleum is burning and we put water on it, the petroleum will just float and won't stop burning. Water is a good conductor of electricity thus, if one puts on water on any electrical equipment, he/she might get electrocuted.
Water is a good conductor of electricity. If used in fires involving electrical equipment, it will cause electric shocks or short circuit. By :- Jaspreet Kaur
Ma'am, the highly inflammable substance that is produced when calcium carbide reacts with ice is acetylene, it has a fire hazard rating of 4 which is severe....
Water is a good conductor of electricity that is why if a person sprays water on an electric fire then they will get an electric shock. If we spray water on petrol fire then petrol will float on water that will increase the range of fire.
This is because the water is heavier than the petrol that’s why it gets on and stop and then petrol still burns and when water is extinguished on the electrical equipment it can cause electric shock and cause more harm to living beings
Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. Due to this reason, water is not used to put off the fire caused due to electricity. From-Arkapravo Dey
Water is a good conductor of electricity. If used in fires involving electrical equipment, it will cause electric shocks or short circuit. Electrical fires need to be put out by a substance that is non-conductive, unlike the water or foam found in fire extinguishers. If someone attempts to put out an electrical fire with something like water , there is a high risk of electrocution, since water is conductive. Hence, water is not used to control fires involving electrical equipment.
1) If someone attempts to put out an electrical fire with water , there is a high risk of injury or death, since water is conductor of electricity. Hence, water is not used to control fires involving electrical equipment. 2)As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire.
In case of electric fire,the water may conduct the current,which can harm the person who is trying to put out the fire.The person might get electrocuted
As water is a good conductor of electricity when we use water as extinguisher it conducts the fire caused by electricity and causes danger to the people extinguishing it. In case of fires caused by petrol, as petrol is a immiscible substance the petrol fire floats and spread on the water and increases the fire.
We cant use water in petrol fires Because Water has Oxygen in its composition and Oxygen Supports Combustion. Also Water does a shot circuit in electrical equipment
Water is good conductor of electricity.If we use water 💦 to extinguish fire 🔥 caused by electric ⚡💡 equipment.The current comming out of wires can effect water.This can cause electric ⚡ 😲.
Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. Due to this reason, water is not used to put off the fire caused due to electricity...
After answering the homework i searched in google for correct answer. the answer was the exact answer you wrote. So you just copied the answer from google 😑
Ma'am you left out one unfavourable effect of fuel; incomplete combustion of fuels can produce carbon monoxide gas which is poisonous and toxic. If coal is made to undergo combustion in a closed room, the accumulating carbon monoxide can kill the people in that room.
We know that water is a good conductor of electricity .The person get electric shock when it come in contact with water which is used to extinguish the fire.Due to this reason ,water is not used to put of the fire due to electricity
Homework Question Why water is not used to extinguish fire caused by electrical equipment and petrol? Answer- Water is a good conductor of electricity.The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. If used in fires involving electrical equipment, it will cause electric shocks or short circuit. Due to this reason, water is not used to put off the fire caused due to electricity. As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire. -Abhirami S
Water is a good fire extinguisher. But, water cannot be used to extinguish electrical fires. This is because water is a good conductor of electricity. It can cause electric shock and can harm the person who is trying to put it off.
ans for the home work This is because water is a good conductor of electricity. It can cause electric shock and can harm the person who is trying to put it off.
Water is not used to extiguish fire caused by electrical equipment or petrol because it will cause electric shocks or short circuit or it can increase fire .
Answer for homework question:- Water may conduct electricity and it also harms the people trying to douse the fire. Water is heavier than oil. So, oil floats on top of water and the oil keeps burning on the top. This is why water is not used to extinguish fire caused by electrical equipment.
HOME WORK QUESTION Why is water not used to extinguish fire caused by electrical equipment or petrol? Answer- Water is not used for extinguishing fires caused due to electrical faults because water is good conductor of electricity. If water is poured on an electrical fire,the water could conduct electricity causing the person trying to extinguish the fire to experience an electric shock.
Thank you mam for the wonderful session but i think you was not as interactive as Khusbu mam or Aishwarya mam. I think you should read comments and answer them more often.
Answer of homework question is Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire.
Name: Kavya Homework answer: Water is not used to extinguish the fire caused by electrical equipment because water is a good conductor of electricity. It facilitates the flow of electricity hence, increasing the fire. Water is not used to extinguish the fire caused by petrol because petrol being lighter than water floats on it and is able to obtain sufficient oxygen.
Water is not used as a fire extinguisher for fuel petrol fire and electrical fire because: 1. Petrol is lighter than water. 2. It floats in water and it gets more spaceised and spreads fire all around. 4. As water is the good conductor of electricity it is not used as a fire extinguisher. 5.It will increase the conductivity of electricity more in the fire case . thank you it was amazing session😊😊
We would like to congratulate you Sneha for giving the Best Answer to the Homework Question asked in this session. We have pinned your comment as promised! So proud that you saw and learn from the class so wonderfully. Keep watching and rocking! 😀 Also, we have featured your comment on BYJU'S 6, 7 & 8 telegram, click to see 👉: t.me/byjusclasses678official
1. Petrol does not dissolve in water. It just floats above it. It does not mix either. Hence, extinguishing petrol fire with water will not change anything, the fire will continue to burn, releasing harmful toxins.
2. For extinguishing fire, we use tap water. Tap water contains a lot of soluble salts and impurities. This increases the flow of ions, so tap water is a good conductor of electricity. Using water to extinguish electrically caused fires, will increase the burning, instead of extinguishing it.
Thank you!
Petroleum doesn't dissolve with water thus when the petroleum is burning and we put water on it, the petroleum will just float and won't stop burning. Water is a good conductor of electricity thus, if one puts on water on any electrical equipment, he/she might get electrocuted.
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💦@@byjus-class-678
Water is a good conductor of electricity. If used in fires involving electrical equipment, it will cause electric shocks or short circuit.
By :- Jaspreet Kaur
thank you mam for teaching us so nicely😊😊
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Isn't it salt water?
6:31 Combustion is the process in which a substance react with oxygen and produces heat and light.
Amazing Abhinav🤗
Ma'am, the highly inflammable substance that is produced when calcium carbide reacts with ice is acetylene, it has a fire hazard rating of 4 which is severe....
Water is a good conductor of electricity that is why if a person sprays water on an electric fire then they will get an electric shock.
If we spray water on petrol fire then petrol will float on water that will increase the range of fire.
LMAO, No, Its not like that... The petrol is not gonna float or something.
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This is because the water is heavier than the petrol that’s why it gets on and stop and then petrol still burns and when water is extinguished on the electrical equipment it can cause electric shock and cause more harm to living beings
Thank you ma'am
Very easy to understand 😊
Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. Due to this reason, water is not used to put off the fire caused due to electricity.
From-Arkapravo Dey
From Google?
@@ujwalj7001 Yes
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Water is a good conductor of electricity. If used in fires involving electrical equipment, it will cause electric shocks or short circuit. Electrical fires need to be put out by a substance that is non-conductive, unlike the water or foam found in fire extinguishers. If someone attempts to put out an electrical fire with something like water , there is a high risk of electrocution, since water is conductive. Hence, water is not used to control fires involving electrical equipment.
Good! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍
1) If someone attempts to put out an electrical fire with water , there is a high risk of injury or death, since water is conductor of electricity. Hence, water is not used to control fires involving electrical equipment.
2)As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire.
Good! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍
In case of electric fire,the water may conduct the current,which can harm the person who is trying to put out the fire.The person might get electrocuted
Finding the calorific value :
CV = Kilojule / Kilogram --> kJ/kg
kJ = 10,000
kg = 5
Therefore, CV (calorific value)
= 10,000/5
= 2000.
= 2000 kJ/kg.
thankyou for teaching us freeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
water is a best example for non combustible
As water is a good conductor of electricity when we use water as extinguisher it conducts the fire caused by electricity and causes danger to the people extinguishing it. In case of fires caused by petrol, as petrol is a immiscible substance the petrol fire floats and spread on the water and increases the fire.
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Matchsticks, charcoal, straw
Stone is non combustible
We cant use water in petrol fires Because Water has Oxygen in its composition and Oxygen Supports Combustion. Also Water does a shot circuit in electrical equipment
Also Sand is used in case of a petroleum or electrical fire.
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Thankyou mam for this Amazing Session 👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍😊❤😊❤😊❤😊❤😊❤😊❤❤😊❤😊❤😊❤😊😊❤😊❤👏💫✨💛👋👍💗💕🌻😀🤗❣️🌈❤️🌼💞♥️🤭💖💜💓⭐🌟🌺💐
What is a conductor of electricity and is alo heavier than petrol so it will harm the one's trying to dose it
12:32 of course we can burn a paper by a single matchstick.
inWater the petrol will float and increase more fire
14:59 LPG -lequified petroleum gas
Liquified*
If electrical equipment is on fire water electricity and harm those tring to douse the fire involving oil and petrol
Water is good conductor of electricity.If we use water 💦 to extinguish fire 🔥 caused by electric ⚡💡 equipment.The current comming out of wires can effect water.This can cause electric ⚡ 😲.
Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. Due to this reason, water is not used to put off the fire caused due to electricity...
After answering the homework i searched in google for correct answer. the answer was the exact answer you wrote. So you just copied the answer from google 😑
Hey , not really!
@@ayush-thelearner8028 R U telling the truth? bc the answer in google is simliar to your answer word by word
@@ujwalj7001 Lmao he posted in just 3 secs. Noone can write that fast.
I don't want to make mess,
I can write fast
Please don't make mess
As the water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn
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Ma'am you left out one unfavourable effect of fuel; incomplete combustion of fuels can produce carbon monoxide gas which is poisonous and toxic. If coal is made to undergo combustion in a closed room, the accumulating carbon monoxide can kill the people in that room.
Yes agreed
Because water is good conductor of electricity and petrol fire we can't handle with water
We know that water is a good conductor of electricity .The person get electric shock when it come in contact with water which is used to extinguish the fire.Due to this reason ,water is not used to put of the fire due to electricity
Good! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍
HOMEWORK ANSWER -
If electrical equipment is on fire water may conduct electricity and harm those trying to douse the fire
Amazing😍
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Homework Question
Why water is not used to extinguish fire caused by electrical equipment and petrol?
Answer-
Water is a good conductor of electricity.The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire. If used in fires involving electrical equipment, it will cause electric shocks or short circuit. Due to this reason, water is not used to put off the fire caused due to electricity. As water is heavier than petrol therefore slips down permitting the petrol to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire evaporates even before it can extinguisher the fire.
-Abhirami S
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Combustion is the process in which a substance react with oxygen and produce heat and light
Because water is the good conductor of electricity
fossil fuels, petroleum, cooking gas, kerosene oil, coal, charcoal, wood, leaves, paper, wax, hydrogen gas, ethanol, methane, propane, and propene.
Good evening mam
Water is a good fire extinguisher. But, water cannot be used to extinguish electrical fires. This is because water is a good conductor of electricity. It can cause electric shock and can harm the person who is trying to put it off.
ans for the home work
This is because water is a good conductor of electricity. It can cause electric shock and can harm the person who is trying to put it off.
5:59 class ✨ starts
liquified petroleum gas...
👍👍👍👍👍👍👍👍👍
Yes, mam 😊
Hii
Amazing explanation 👍👍
Amazing session ma'am love you ma'am
Water is a conductor.
So it will cause a shock to the person.
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good morning mam my name is Anurag . mam can you please tell what is fuel efficiency .
nothing
Yes
😊😊😊😊😊😊😊😊😊😊😊
Water is good conductor of electricity so , when we put water to electric equipment then we might get shock
Full form of CNG is Compressed Natural Gas
Yeah👍
Nice explanation
Because water is the good conductor of electricity, and it can affect the who is nearby
👍👍👍
I LIKE COMMERCE AND SCIENCE BOTH
Liquid petroleum gas
Water is not used to extiguish fire caused by electrical equipment or petrol because it will cause electric shocks or short circuit or it can increase fire .
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Answer for homework question:-
Water may conduct electricity and it also harms the people trying to douse the fire. Water is heavier than oil. So, oil floats on top of water and the oil keeps burning on the top. This is why water is not used to extinguish fire caused by electrical equipment.
😊
Ma'am what is spm?
combustion and flame
HOME WORK QUESTION
Why is water not used to extinguish fire caused by electrical equipment or petrol?
Answer-
Water is not used for extinguishing fires caused due to electrical faults because water is good conductor of electricity. If water is poured on an electrical fire,the water could conduct electricity causing the person trying to extinguish the fire to experience an electric shock.
Good! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍
Water is a good conductor of the both
Full form of LPG is Liquified Petroleum Gas
Good
Thank you mam for the wonderful session but i think you was not as interactive as Khusbu mam or Aishwarya mam. I think you should read comments and answer them more often.
Most welcome 😊 Please subscribe for more Interesting classes!
Kerosene is a combustible substance
👍👍👍👍👍👍👍👍👍👍👍👍
Yes mam
I understood this video.
non luminous zone ,luminous zone ,dark zone ,blue zone
Water is a good conductor of electricity. So it passes electricity. Hence it cannot be used to extinguish fire caused by electricity.
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😀
I like science
You are very beautiful and very nice
hi mama
snigddha
From where I can get pdf
hi mam my name is snigddha
Answer of homework question is Water is a good conductor of electricity. The person gets an electric shock when it comes in contact with the water which is used to extinguish the fire.
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Mam, steel
Dry leaves
Extinguisher fire I am used in my school 🏫🏫
I want physics sir to talk in English.
The real chapter starts at 5:56 thank me later
hii mam
👍👍😄😃
fuel b
Name: Kavya
Homework answer:
Water is not used to extinguish the fire caused by electrical equipment because water is a good conductor of electricity. It facilitates the flow of electricity hence, increasing the fire.
Water is not used to extinguish the fire caused by petrol because petrol being lighter than water floats on it and is able to obtain sufficient oxygen.
Good! Stay tuned to our Channel for further updates on upcoming Amazing Sessions! 👍
Water is not used as a fire extinguisher for fuel petrol fire and electrical fire because:
1. Petrol is lighter than water.
2. It floats in water and it gets more spaceised and spreads fire all around.
4. As water is the good conductor of electricity it is not used as a fire extinguisher.
5.It will increase the conductivity of electricity more in the fire case .
thank you it was amazing session😊😊
We would like to congratulate you Sneha for giving the Best Answer to the Homework Question asked in this session. We have pinned your comment as promised!
So proud that you saw and learn from the class so wonderfully. Keep watching and rocking! 😀
Also, we have featured your comment on BYJU'S 6, 7 & 8 telegram, click to see 👉: t.me/byjusclasses678official
@@byjus-class-678 tq mam😃🙂
Blue
start
Darshika
Start
Mam what is the difference between comustible substance and fuel ????
They both are same as mam told
Cotton
i have some dought
please solve my dought
In our school cooridor there is fire 🔥🔥🔥 extenguiser
shivank
Hi friend