The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg). https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not because the ignition temperature of paper is low as compare to the paper wrapped around an aluminium pipe. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not because the ignition temperature of paper is low as compare to the paper wrapped around an aluminium pipe.
LPG is a good fuel as compared to wood as it readily available and it is cheap. It burns easily in air at a moderate rate and it produces a large amount of heat. It does not leave behind any undesirable substances. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
LPG is a good fuel as compared to wood as it readily available and it is cheap. It burns easily in air at a moderate rate and it produces a large amount of heat. It does not leave behind any undesirable substances.
Water is not used to control fires involving electrical equipment because it may conduct electricity and harm those trying to douse the fire. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Water is not used to control fires involving electrical equipment because it may conduct electricity and harm those trying to douse the fire.
CNG produces very small amounts of harmful products like Sulphur dioxide, oxides of nitrogen, oxides of sulphur etc. CNG is a cleaner fuel. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
CNG produces very small amounts of harmful products like Sulphur dioxide, oxides of nitrogen, oxides of sulphur etc. CNG is a cleaner fuel.
Name the unit in which the calorific value of a fuel is expressed.
The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg). https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The calorific value of a fuel is expressed in a unit called kilojoule per kg (kJ/kg).
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessGive reasons: Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminum pipe does not.
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not because the ignition temperature of paper is low as compare to the paper wrapped around an aluminium pipe. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not because the ignition temperature of paper is low as compare to the paper wrapped around an aluminium pipe.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessGive reasons: LPG is a better domestic fuel than wood.
LPG is a good fuel as compared to wood as it readily available and it is cheap. It burns easily in air at a moderate rate and it produces a large amount of heat. It does not leave behind any undesirable substances. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
LPG is a good fuel as compared to wood as it readily available and it is cheap. It burns easily in air at a moderate rate and it produces a large amount of heat. It does not leave behind any undesirable substances.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessGive reasons: Water is not used to control fires involving electrical equipment.
Water is not used to control fires involving electrical equipment because it may conduct electricity and harm those trying to douse the fire. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Water is not used to control fires involving electrical equipment because it may conduct electricity and harm those trying to douse the fire.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessExplain how the use of CNG in automobiles has reduced pollution in our cities.
CNG produces very small amounts of harmful products like Sulphur dioxide, oxides of nitrogen, oxides of sulphur etc. CNG is a cleaner fuel. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
CNG produces very small amounts of harmful products like Sulphur dioxide, oxides of nitrogen, oxides of sulphur etc. CNG is a cleaner fuel.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See less