In a roller coaster, both the kinetic and potential energy in the car decreases at each successive hill because of
which converts
energy into
energy

fe 55.85 g/mol and h2o 18.02 g/mol.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms