Unit test
unit test review
active
1
scientists described light as a wave because the results of many experiments with light demonstrated that light behaves as a
wave. light is now described as having properties of both a wave and a particl
what is the most likely reason why this change was made?
enough scientists voted to accept the change,
data collected from many experiments could not be explained using waves
a well-known scientist published a paper that described light as a particle.
a single experiment's results demonstrated both wave and particle properties

there are two significant figures.

i think is conclusions.i think so

it is the minimum amount of material needed to sustain a fission reaction.

critical mass is the minimum amount of fissionable material that must be assembled for a sustained fission reaction to take place. although two to three neutrons are produced for every fission, not all of these neutrons are available for continuing the fission reaction. if the conditions are such that the neutrons are lost at a faster rate than they are formed by fission, the chain reaction will not be self-sustaining.   at the point where the chain reaction can become self-sustaining, this is referred to as critical mass.