Question
Write an expression for the work done when a force is acting on an object in the direction of its displacement.
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Name the region of the atmosphere where most of the atmospheric gases are present.
What is the region of megadiversity?
| Ion | Valency(Charges) | Ion | Valency(Charge) |
| Sodium ion | 1+ | Nitrate ion | 1- |
| Copper ion | 2+ | Sulphide ion | 2- |