MCQ
What is needed to calculate work?
- ATime and distance.
- BSpeed and distance.
- CForce and direction.
- DAcceleration and velocity.
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The weight of an object at the centre of the earth of radius R is:
Signs of eutrophication of water bodies include:
| S.No. | Matter | Classification |
| 1. | Water | |
| 2. | Mercury | |
| 3. | Air | |
| 4. | Tin | |
The hardness of the bone tissue is due to the phosphates and carbonates of: