The following figures give the approximate distances of five galaxies from earth. rank the galaxies based on the speed with which each should be moving away from earth due to the expansion of the universe, from fastest to slowest.
a) 5 billion light-years
b) 2 billion light-years
c) 800 million light-years
d) 230 million light-years
e) 70 million light-years

In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy