The surface of water can act like a sort of skin due to a property of liquids called
a. viscosity.
b. surface tension.
c. condensation.
d. evaporation.

What is a metal replacement reaction

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.

Which fact represents evidence for the big bang theory?