Question
Write an essay on crop protection management.
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Write a short note on prevention of animal diseases.

Universal law of gravitation states that every object exerts a gravitational force of attraction on every other object. If this is true, why don’t we notice such forces? Why don’t the two objects in a room move towards each other due to this force?

A girl of mass 50kg jumps out of a rowing boat of mass 300kg on to the bank, with a horizontal velocity of 3m/s. With what velocity does the boat begin to move backwards?