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

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?