Please help me I have been getting C’s D’s and F’s please help me

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?