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प्रश्न
What is the difference between renewable and non-renewable resources?
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उत्तर
| Renewable Sources | Non-renewable Sources |
| 1. The resources that can be renewed by reproduction are called renewable resources. | 1. The resources that are present in fixed quantities are called non-renewable. |
| 2. Renewable resources are inexhaustible. | 2. Non-renewable resources are exhaustible. |
| 3. Renewable resources are not affected by human activities. | 3. Non-renewable resources are affected by human activities. |
| 4. They are the non-conventional sources. | 4. They are the conventional sources. |
| 5. Example: Wind energy, solar energy, and hydro energy. | 5. Example: Coal, petroleum, and natural gas. |
संबंधित प्रश्न
What is the work done by the moon when it revolves around the earth?
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Calculate:
- the work done, and
- the power developed by him. Take g = 10 N kg-1
A boy weighing 25 kgf climbs up from the first floor at height 3 m above the ground to the third floor at height 9m above the ground. What will be the increase in his gravitational potential energy? (Take g = 10 N kg -1)
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
Define 1 joule of work.
Complete the following sentences:
The SI unit of work is ....... and of power is .......
Fill in the boxe to show the corresponding energy transformation.

Mention whether work is done or not in the following activity.
| S. No | Activity | Work done or not done |
| 1. | Pushing the door | |
| 2. | Holding a doll | |
| 3. | Sitting in a bus | |
| 4. | Pushing a wall | |
| 5. | Digging soil |
