What is the increase in pressure required to decrease volume of mercury by 0.001%

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According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?