identical spheres are dropped from a height of 100m above the surfaces of both planet x and planet y. the position of the spheres as a function of time is recorded as the spheres fall. these data are shown in the graphs above. which planet exerts a greater gravitational force on the sphere, and what evidence supports this conclusion?

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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change tension

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.