are the way moves from place to place Word bank: Waves, wave, transverse, longitudinal, wavelength, amplitude, compressional, rarefaction, energy, sound, particle, light, perpendicular, particle, particles, matter

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.