Which object in the solar system is shown in the image? (15 points) (See picture below)

Select one:
a. Asteroid
b. Comet
c. Galaxy
d. Star

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.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Helium decays to form lithium. which equation correctly describes this decay?