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Install NowRitambhara
Nov 6, 2014
Difference between luminous and non-luminous flame.
Abcdefgh
Nov 30, 2013
We do not use water during an electric fire as it is a good conductor of electricity.but while doing electrolysis, we add a few drops of H2SO4 to make it a good conductor.So exactly is water a good or bad conductor?
Mangesh
Aug 18, 2015
Three examples of non combustible substances.
Examples of non-combustible substances are
rock,steel,water,sand etc.
Prasheek Shashikant
Nov 18, 2013
Why carbon dioxide gas is used to extinguished fire caused by petrol Diesel or kerosene? Why not water?
Arjun R.Unnithan
Nov 12, 2013
I found the answer as 40000 KJ/Kg but the answer in the Learn Next NCERT Science Solution it is given as 4000KJ/Kg.When I referes to the Calculator it shown that 180000/4.5= 40000.
= 1800000/4.5 as the decimal goes to N = numerator
=4000kj/kg
ok
Sharanya
Oct 22, 2013
EXAMPLE OF SLOW COMBUSTION ?
Dhruv Tanwar
Mar 8, 2015
dry leaves catch fire easily but it is difficult to burn a heap of green leaves ?
...
Mohit Dubey
Aug 23, 2015
why are gaseous fuels better than solid and liquid ones?
Calorific value is defined as the amount of heat energy produced on complete combustion of 1 kilogram of a fuel. When a gaseous fuel burns it gives off a great deal of energy . And unl...
Raj Sharma
Mar 4, 2014
what is the equation of soda acid fire extinguisher?
what is the equation of soda acid fire extinguisher?
2NaHCO3 + H2SO4 ⇒ Na2SO4 + 2H2O + 2CO2
Saloni somani
Nov 15, 2014
In olden times when we used to cook the food on chulha , we used to light the papers , dry grass or some pieces of wood. It would not catch the fire so we used to blow the air from a pipe so that it could catch fire instantly. But at the same time, we use a blow of air to extinguish the flame of a candle . So the question is how the blow of air can also create fire and can also extinct fire?
Oxygen is necessary for combustion.
Blowing out a candle makes the candle goes out. Because in candle the flame is due to burning of vapoutized wax. When we blow the candle the va...
Ritambhara
Nov 6, 2014
Difference between luminous and non-luminous flame.
Abcdefgh
Nov 30, 2013
We do not use water during an electric fire as it is a good conductor of electricity.but while doing electrolysis, we add a few drops of H2SO4 to make it a good conductor.So exactly is water a good or bad conductor?
Mangesh
Aug 18, 2015
Three examples of non combustible substances.
Examples of non-combustible substances are
rock,steel,water,sand etc.
Prasheek Shashikant
Nov 18, 2013
Why carbon dioxide gas is used to extinguished fire caused by petrol Diesel or kerosene? Why not water?
Arjun R.Unnithan
Nov 12, 2013
I found the answer as 40000 KJ/Kg but the answer in the Learn Next NCERT Science Solution it is given as 4000KJ/Kg.When I referes to the Calculator it shown that 180000/4.5= 40000.
= 1800000/4.5 as the decimal goes to N = numerator
=4000kj/kg
ok
Sharanya
Oct 22, 2013
EXAMPLE OF SLOW COMBUSTION ?
Dhruv Tanwar
Mar 8, 2015
dry leaves catch fire easily but it is difficult to burn a heap of green leaves ?
...
Mohit Dubey
Aug 23, 2015
why are gaseous fuels better than solid and liquid ones?
Calorific value is defined as the amount of heat energy produced on complete combustion of 1 kilogram of a fuel. When a gaseous fuel burns it gives off a great deal of energy . And unl...
Raj Sharma
Mar 4, 2014
what is the equation of soda acid fire extinguisher?
what is the equation of soda acid fire extinguisher?
2NaHCO3 + H2SO4 ⇒ Na2SO4 + 2H2O + 2CO2
Saloni somani
Nov 15, 2014
In olden times when we used to cook the food on chulha , we used to light the papers , dry grass or some pieces of wood. It would not catch the fire so we used to blow the air from a pipe so that it could catch fire instantly. But at the same time, we use a blow of air to extinguish the flame of a candle . So the question is how the blow of air can also create fire and can also extinct fire?
Oxygen is necessary for combustion.
Blowing out a candle makes the candle goes out. Because in candle the flame is due to burning of vapoutized wax. When we blow the candle the va...