PLEASE HELP!

how can nuclear fission be made to happen?

a. atoms are hit with neutrons

b. atoms are hit with x rays

c. atoms are hit with light

d. atoms are hit with gases

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?

How does the motion of particles in a gas change as the gas cools

Which statement accurately represents the arrangement of electrons in bohr’s atomic model?