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Yogita Ingle 7 years, 4 months ago
Calorific value: Calorific value is defined as the amount of heat energy produced on complete combustion of 1 kilogram of a fuel. It is expressed in a unit called kilojoule per kg. The higher the calorific value of a fuel, the more is its efficiency.
Table below shows calorific value of different fuels:
| Fuel | Calorific value |
| Hydrogen | 150000 |
| LPG | 55000 |
| CNG | 50000 |
| Methane | 50000 |
| Petrol | 45000 |
| Kerosene | 45000 |
| Diesel | 45000 |
Posted by Deepak Kumar 7 years, 4 months ago
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Yogita Ingle 7 years, 4 months ago
The disease caused due to the presence of large number of micro-organism in the food,or due to the presence of toxic substances in food formed by the action of micro-organism is called food poisoning. The major symptoms of food poisoning are :Vomiting,diarrhoea,pain in abdomen,headache and fever.
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Yogita Ingle 7 years, 4 months ago
Viruses are also microscopic but they are not considered as living beings. They are considered as a borderline case between living and non-living. A virus behaves as non-living when it is outside a host cell, i.e. a virus does not carry on nutrition, respiration or reproduction when it is outside a host. But once it is inside a host, it behaves like a living being, i.e. it carries on nutrition, respiration and reproduction when it is inside a host. Examples: HIV, Tobacco Mosaic Virus (TMV), etc.
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Yogita Ingle 7 years, 4 months ago
Metals are ductile, i.e. they can be drawn into thin wires. And Non-metals are not ductile. So, wire are made of metals.
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Satyajit Ghadei 7 years, 4 months ago
3Thank You