A scientist studies a model of a widely accepted theory about the universe. the model would most likely help the scientist to A- understand a theory which cannot be observed,
B- prove that the theory would not change in the future,
C-demonstrate how the theory can be changed into a law,
D- prove that all the other theories about the universe are incorrect

NEED HELP ASAP

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?

During cooling, the kinetic energy of the molecules falls. why does this happen? a.the motion of the molecules increases. b. the motion of the molecules slows down. c.the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.