A light and a sound wave hit a piece of cardboard. How do the waves interact with the cardboard through transmission, absorption or reflection? the interactions of a light wave with a piece of cardboard
the interactions of a sound wave with a piece of cardboard

Be sure the description includes:

two ways that the interactions of a light wave with a piece of cardboard are similar to the interactions of a sound wave with a piece of cardboard, and
one way that the interactions are different

2b2t

explanation:

2b2t

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.