A solar cooker uses heat of the sunlight to cook the food. A concave mirror is used in order to reflect and focus sunlight at a particular area. The mirror focuses all the incident sunlight at a point. The temperature at that point increases, thereby cooking and heating the food placed at that partiRead more
A solar cooker uses heat of the sunlight to cook the food. A concave mirror is used in order to reflect and focus sunlight at a particular area. The mirror focuses all the incident sunlight at a point. The temperature at that point increases, thereby cooking and heating the food placed at that particular area.
To use energy of flowing water large dams are built in hilly regions to store huge amount of water at a height. The stored water from high level in dam is carried through pipes to the turbine at the bottom of the dam and runs hydropower plant. Similarly, the wind energy is used to generate electriciRead more
To use energy of flowing water large dams are built in hilly regions to store huge amount of water at a height. The stored water from high level in dam is carried through pipes to the turbine at the bottom of the dam and runs hydropower plant.
Similarly, the wind energy is used to generate electricity. For the same purpose, the rotatory motion of windmill is used to tum the turbine of the electric generator.
Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. These sources of energy are limited and cannot replenish on their own. They are being consumed at a large rate. If this rate of consumption continues, then the fossil fuels wouRead more
Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. These sources of energy are limited and cannot replenish on their own. They are being consumed at a large rate. If this rate of consumption continues, then the fossil fuels would be exhausted from the Earth. Therefore, we should look for alternate sources of energy.
There are following disadvantages of fossil fuels like coal and petroleum: • Burning of coal or petroleum causes air pollution. • Acidic oxides like oxides of carbon, nitrogen and sulphur are released on burning fossil fuels. These oxides lead to acid rains, which affect our water and soil resourcesRead more
There are following disadvantages of fossil fuels like coal and petroleum:
• Burning of coal or petroleum causes air pollution.
• Acidic oxides like oxides of carbon, nitrogen and sulphur are released on burning fossil fuels. These oxides lead to acid rains, which affect our water and soil resources.
• Carbon dioxide gas also causes greenhouse effect in atmosphere.
• Fossil fuels are non-renewable sources of energy.
We shall use LPG/CNG gas or electricity for heating our food because these are efficient ways of supplying energy. Thermal efficiency of the energy source is large, there is less pollution and the source can be used easily. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutRead more
We shall use LPG/CNG gas or electricity for heating our food because these are efficient ways of supplying energy. Thermal efficiency of the energy source is large, there is less pollution and the source can be used easily.
A good fuel produces a large amount of heat on burning, does not produce a lot of smoke and is easily available. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
A good fuel produces a large amount of heat on burning, does not produce a lot of smoke and is easily available.
A good source of energy should have the following qualities: • It should be easily available. • It should do a large amount of work (or produce large amount of heat) per unit volume/mass. • It should be easy to store and transport. •It should be economical. • It should cause less environmental polluRead more
A good source of energy should have the following qualities:
• It should be easily available.
• It should do a large amount of work (or produce large amount of heat) per unit volume/mass.
• It should be easy to store and transport.
•It should be economical.
• It should cause less environmental pollution.
Industrialization increases the demand for energy. Fossil fuels are easily accessible sources of energy that fulfil this demand. The increased use of fossil fuels has a harsh effect on the environment. Too much exploitation of fossil fuels increases the level of greenhouse gas content in the atmosphRead more
Industrialization increases the demand for energy. Fossil fuels are easily accessible sources of energy that fulfil this demand. The increased use of fossil fuels has a harsh effect on the environment. Too much exploitation of fossil fuels increases the level of greenhouse gas content in the atmosphere, resulting in global warming and a rise in the sea level.
It is not possible to completely reduce the consumption of fossil fuels. However, some measures can be taken such as using electrical appliances wisely and not wasting electricity. Unnecessary usage of water should be avoided. Public transport system with mass transit must be adopted on a large scale. These small steps may help in reducing the consumption of natural resources and conserving them.
Solar cooker uses Sun’s energy to cook food stuff. It is inexhaustible, clean and renewable source of energy. It is free for all and available in unlimited amount. Hence, operating a solar cooker is not expensive. Disadvantage of a solar cooker is that it (solar cooker) is very expensive. It works oRead more
Solar cooker uses Sun’s energy to cook food stuff. It is inexhaustible, clean and renewable source of energy. It is free for all and available in unlimited amount. Hence, operating a solar cooker is not expensive.
Disadvantage of a solar cooker is that it (solar cooker) is very expensive. It works only in sunlight. Hence, on cloudy day, it becomes useless.
The places where the days are too short or places with cloud covers round the year, have limited utility for solar cooker.
An ideal source of energy must be: • Economical • Easily accessible • Smoke/pollution free • Easy to store and transport • Able to produce huge amount of heat and energy on burning For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
An ideal source of energy must be:
• Economical
• Easily accessible
• Smoke/pollution free
• Easy to store and transport
• Able to produce huge amount of heat and energy on burning
What kind of mirror – concave, convex or plain – would be best suited for use in a solar cooker? Why?
A solar cooker uses heat of the sunlight to cook the food. A concave mirror is used in order to reflect and focus sunlight at a particular area. The mirror focuses all the incident sunlight at a point. The temperature at that point increases, thereby cooking and heating the food placed at that partiRead more
A solar cooker uses heat of the sunlight to cook the food. A concave mirror is used in order to reflect and focus sunlight at a particular area. The mirror focuses all the incident sunlight at a point. The temperature at that point increases, thereby cooking and heating the food placed at that particular area.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
How has the traditional use of wind and water energy been modified for our convenience?
To use energy of flowing water large dams are built in hilly regions to store huge amount of water at a height. The stored water from high level in dam is carried through pipes to the turbine at the bottom of the dam and runs hydropower plant. Similarly, the wind energy is used to generate electriciRead more
To use energy of flowing water large dams are built in hilly regions to store huge amount of water at a height. The stored water from high level in dam is carried through pipes to the turbine at the bottom of the dam and runs hydropower plant.
Similarly, the wind energy is used to generate electricity. For the same purpose, the rotatory motion of windmill is used to tum the turbine of the electric generator.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
Why are we looking at alternate sources of energy?
Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. These sources of energy are limited and cannot replenish on their own. They are being consumed at a large rate. If this rate of consumption continues, then the fossil fuels wouRead more
Fossil fuels, which have been traditionally used by human beings as an energy sources, are non-renewable sources of energy. These sources of energy are limited and cannot replenish on their own. They are being consumed at a large rate. If this rate of consumption continues, then the fossil fuels would be exhausted from the Earth. Therefore, we should look for alternate sources of energy.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the disadvantages of fossil fuels?
There are following disadvantages of fossil fuels like coal and petroleum: • Burning of coal or petroleum causes air pollution. • Acidic oxides like oxides of carbon, nitrogen and sulphur are released on burning fossil fuels. These oxides lead to acid rains, which affect our water and soil resourcesRead more
There are following disadvantages of fossil fuels like coal and petroleum:
• Burning of coal or petroleum causes air pollution.
• Acidic oxides like oxides of carbon, nitrogen and sulphur are released on burning fossil fuels. These oxides lead to acid rains, which affect our water and soil resources.
• Carbon dioxide gas also causes greenhouse effect in atmosphere.
• Fossil fuels are non-renewable sources of energy.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
If you could use any source of energy for heating your food, which one would you use and why?
We shall use LPG/CNG gas or electricity for heating our food because these are efficient ways of supplying energy. Thermal efficiency of the energy source is large, there is less pollution and the source can be used easily. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutRead more
We shall use LPG/CNG gas or electricity for heating our food because these are efficient ways of supplying energy. Thermal efficiency of the energy source is large, there is less pollution and the source can be used easily.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What is a good fuel?
A good fuel produces a large amount of heat on burning, does not produce a lot of smoke and is easily available. For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
A good fuel produces a large amount of heat on burning, does not produce a lot of smoke and is easily available.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What is a good source of energy?
A good source of energy should have the following qualities: • It should be easily available. • It should do a large amount of work (or produce large amount of heat) per unit volume/mass. • It should be easy to store and transport. •It should be economical. • It should cause less environmental polluRead more
A good source of energy should have the following qualities:
• It should be easily available.
• It should do a large amount of work (or produce large amount of heat) per unit volume/mass.
• It should be easy to store and transport.
•It should be economical.
• It should cause less environmental pollution.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the environmental consequences of the increasing demand for energy? What steps would you suggest to reduce energy consumption?
Industrialization increases the demand for energy. Fossil fuels are easily accessible sources of energy that fulfil this demand. The increased use of fossil fuels has a harsh effect on the environment. Too much exploitation of fossil fuels increases the level of greenhouse gas content in the atmosphRead more
Industrialization increases the demand for energy. Fossil fuels are easily accessible sources of energy that fulfil this demand. The increased use of fossil fuels has a harsh effect on the environment. Too much exploitation of fossil fuels increases the level of greenhouse gas content in the atmosphere, resulting in global warming and a rise in the sea level.
It is not possible to completely reduce the consumption of fossil fuels. However, some measures can be taken such as using electrical appliances wisely and not wasting electricity. Unnecessary usage of water should be avoided. Public transport system with mass transit must be adopted on a large scale. These small steps may help in reducing the consumption of natural resources and conserving them.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited utility?
Solar cooker uses Sun’s energy to cook food stuff. It is inexhaustible, clean and renewable source of energy. It is free for all and available in unlimited amount. Hence, operating a solar cooker is not expensive. Disadvantage of a solar cooker is that it (solar cooker) is very expensive. It works oRead more
Solar cooker uses Sun’s energy to cook food stuff. It is inexhaustible, clean and renewable source of energy. It is free for all and available in unlimited amount. Hence, operating a solar cooker is not expensive.
Disadvantage of a solar cooker is that it (solar cooker) is very expensive. It works only in sunlight. Hence, on cloudy day, it becomes useless.
The places where the days are too short or places with cloud covers round the year, have limited utility for solar cooker.
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
What are the qualities of an ideal source of energy?
An ideal source of energy must be: • Economical • Easily accessible • Smoke/pollution free • Easy to store and transport • Able to produce huge amount of heat and energy on burning For more answers visit to website: https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/
An ideal source of energy must be:
• Economical
• Easily accessible
• Smoke/pollution free
• Easy to store and transport
• Able to produce huge amount of heat and energy on burning
For more answers visit to website:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-14/